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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>995835 - Disclosure - Supplemental Balance Sheet Information - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>995845 - Disclosure - Supplemental Balance Sheet Information - Components of Accrued Expenses (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>995855 - Disclosure - Notes Payable - Term Loan Agreement - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>995865 - Disclosure - Notes Payable - Schedule of Debt (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>995875 - Disclosure - Preferred Stock - Additional Information (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>995885 - Disclosure - Warrants - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>995895 - Disclosure - Stockholders' Deficit - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>995905 - Disclosure - Stock-Based Compensation - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>995915 - Disclosure - Stock-Based Compensation - Summary of Stock Option Activity (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>995925 - Disclosure - Stock-Based Compensation - Schedule of Estimated Assumptions Used to Calculate Weighted-Average Grant Date Fair Value of Options Granted (Detail)</link:definition>
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        <link:definition>995935 - Disclosure - Stock-Based Compensation - Schedule of Wainwright Contingent Warrant Activity (Detail)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>995945 - Disclosure - Stock-Based Compensation - Schedule of Nonvested Restricted Stock Units Activity (Detail)</link:definition>
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        <link:definition>995955 - Disclosure - Stock-Based Compensation - Summary of Stock-Based Compensation Expense for Stock Options Granted that was Recorded in the Company's Results of Operations (Detail)</link:definition>
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        <link:definition>995965 - Disclosure - Net Loss Per Share - Additional Information (Detail)</link:definition>
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        <link:definition>995975 - Disclosure - Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail)</link:definition>
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        <link:definition>995985 - Disclosure - US Government Contract - Additional Information (Detail)</link:definition>
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        <link:definition>995995 - Disclosure - Leases - Additional Information (Detail)</link:definition>
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        <link:definition>996005 - Disclosure - Commitments and Contingencies - Additional Information (Details)</link:definition>
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        <link:definition>996015 - Disclosure - Subsequent Events - Additional Information (Detail)</link:definition>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Pre-Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other, net [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Notes Payable, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes payable to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer D.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer D [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer D [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Fair Value Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFromLessor_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive from Lessor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFromLessor_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Space build-out costs paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer A.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Surrender of shares due to tax withholding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Wainwright Contingent Warrant Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SummaryOfContingentInterestPaymentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of contingent interest payments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SummaryOfContingentInterestPaymentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Contingent Interest Payments Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SummaryOfContingentInterestPaymentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Contingent Interest Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue, Remaining Performance Obligation, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction price that is allocated to unsatisfied or partially satisfied performance obligations, that has not yet been recognized as revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OfficeEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OfficeEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Office and Computer Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs and Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Costs and expenses:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NovemberThirtyTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 30, 2023 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NovemberThirtyTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">November Thirty Two Thousand Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NovemberThirtyTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">November thirty two thousand twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for interest to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost related to unvested stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfCommonSharesIssuedUponConversionOfConvertiblePreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of common shares issued upon conversion of convertible preferred stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfCommonSharesIssuedUponConversionOfConvertiblePreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Common Shares Issued Upon Conversion of Convertible Preferred Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfCommonSharesIssuedUponConversionOfConvertiblePreferredStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of common shares issued upon conversion of convertible preferred stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price Per Share, Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity, Reverse Stock Split</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse stock split description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock, gross.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Common Stock Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate gross sales amount of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Shares Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A redeemable convertible preferred stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Temporary equity, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-Based Compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeSpaceLaboratorySpaceAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Office space, laboratory space, and equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeSpaceLaboratorySpaceAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office Space Laboratory Space And Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeSpaceLaboratorySpaceAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Office Space, Laboratory Space, and Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosureItemAmountsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosureItemAmountsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfContractPaymentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of contract payment term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfContractPaymentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Contract Payment Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfContractPaymentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of contract payment term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue, Remaining Performance Obligation, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of revenue recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Assets Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreFundedWarrantAndCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pre-funded warrant and common stock warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreFundedWarrantAndCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-funded Warrant and Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Leases [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock, Class of Stock [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Stock By Class [Table]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaintenanceServicePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maintenance Service Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaintenanceServicePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maintenance Services period (in years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_AT_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AUSTRIA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_AT_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Austria [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivatives, Policy [Policy Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Depletion and Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValuesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period values issuance of common stock pre-funded warrants and series a and series b common stock warrants from private placement, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValuesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Values Issuance Of Common Stock Pre-funded Warrants And Series A And Series B Common Stock Warrants From Private Placement, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValuesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock, Pre-Funded Warrants, and Series A and Series B Common Stock Warrants from private placement, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcessAndRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Work in Process and Raw Materials</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcessAndRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Raw materials and work-in-process inventory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcessAndRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Inventory, Work in Process and Raw Materials, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash Investing and Financing Items [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosures of noncash activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders' Deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FairValueDerivativeLiabilityDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">4% contingent interest beginning in Q4 2024, probability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FairValueDerivativeLiabilityDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value derivative liability discount rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FairValueDerivativeLiabilityDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Derivative Liability Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ToolsDiesAndMoldsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tools, Dies and Molds [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeaseTerminationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating Lease Termination [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeaseTerminationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Termination [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeaseTerminationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease Termination [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CancellationOfTermLoanInExchangeForCommonStockAndConvertiblePreferredStockToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cancellation of Term Loan in exchange for common stock and Convertible Preferred Stock to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CancellationOfTermLoanInExchangeForCommonStockAndConvertiblePreferredStockToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cancellation of Term Loan in Exchange for Common Stock and Convertible Preferred Stock To Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CancellationOfTermLoanInExchangeForCommonStockAndConvertiblePreferredStockToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancellation of Term Loan in exchange for common stock and Convertible Preferred Stock to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Work in Process, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Work-in-process</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCommonStockOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of Common Stock Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCommonStockOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Common Stock Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCommonStockOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of common stock outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock option plans two thousand and six and two thousand and fourteen.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Option Plans Two Thousand And Six And Two Thousand And Fourteen [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2006 and 2014 Stock Option Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesARedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A redeemable convertible preferred stock.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesARedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants to Purchase Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDateRangeEnd1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date Range, End</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDateRangeEnd1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, maturity date end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_AccruedClinicalTrialAndDevelopmentExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued clinical trial and development expenses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_AccruedClinicalTrialAndDevelopmentExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued clinical trial and development expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Operating Capital [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2014Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock Option Plan 2014 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2014Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Option Plan2014 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2014Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2014 Stock Option Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Dividend Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Dividend Yield [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncurrentAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncurrent Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncurrentAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Non-Current Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid expenses and other assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodGrossValueGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Grants In Period Gross Value Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodGrossValueGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate fair value of restricted stock units granted</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeasesEnteredIntoSeptember2021Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating Leases Entered Into September2021.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Issuance Of Common Stock Pre-funded Warrants And Series A And Series B Common Stock Warrants From Private Placement, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock, Pre-Funded Warrants, and Series A and Series B Common Stock Warrants from private placement, net (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Warrant Or Right [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockWarrantUponCashlessExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period, value, issuance of common stock warrant upon cashless exercises.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockWarrantUponCashlessExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Issuance Of Common Stock Warrant Upon Cashless Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockWarrantUponCashlessExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon Common Stock Warrant cashless exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementInitialValueOfConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Collaborative arrangement initial value of consideration.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementInitialValueOfConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement Initial Value Of Consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementInitialValueOfConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial value of consideration receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableNoncontrollingInterestLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Noncontrolling Interest [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DecemberThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 31, 2024 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DecemberThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">December Thirty-One, Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DecemberThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">December Thirty-One, Two Thousand Twenty Four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Portion at Fair Value Measurement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Disclosure Item Amounts [Default]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember_lbl" xlink:role="http://fasb.org/us-gaap/role/label/axisDefault">Portion at Fair Value Measurement [Member] [Default]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Revenue Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue recognized relating to contract liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate Intrinsic Value, Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonStockNumberOfVotesPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of voting rights per share of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonStockNumberOfVotesPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Number Of Votes Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonStockNumberOfVotesPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the number of votes per share of common stock, which the holders of outstanding shares entitled to receive.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payment of debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleSharesIssuable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Conversion of preferred stock into common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleSharesIssuable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock, Convertible Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConvertibleSharesIssuable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Convertible, Shares Issuable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share - basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Asset, after Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Contract with Customer, Asset, after Allowance for Credit Loss, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CostOfProductRevenuePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cost of product revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CostOfProductRevenuePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost Of Product Revenue Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CostOfProductRevenuePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of Product Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer E.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer E [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer E [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeasesEnteredIntoAugust2010Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease Entered into August 2010 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeasesEnteredIntoAugust2010Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Entered Into August2010 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeasesEnteredIntoAugust2010Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to operating leases entered into August 2010.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PaidInKindInterestExpenseToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash interest expense to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PaidInKindInterestExpenseToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Paid in Kind Interest Expense to Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PaidInKindInterestExpenseToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Paid in kind interest expense to related party.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ContingentPaymentOfInterestPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contingent payment of interest, percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ContingentPaymentOfInterestPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Payment Of Interest Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ContingentPaymentOfInterestPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent payment of interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_HCWainwrightCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wainwright [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_HCWainwrightCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">H.C. Wainwright &amp; Co., LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_HCWainwrightCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">H.C. Wainwright &amp; Co., L L C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PaymentForLegalHearingFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non refundable fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PaymentForLegalHearingFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment For Legal Hearing Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PaymentForLegalHearingFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment for legal hearing fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAAndSeriesBCommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A and Series B Common Stock Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAAndSeriesBCommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A and Series B Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAAndSeriesBCommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A and Series B Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionExplanation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionExplanation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining performance obligation, expected timing of satisfaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreferredStockConvertibleSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Preferred stock convertible shares outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreferredStockConvertibleSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Convertible Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreferredStockConvertibleSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock, Convertible Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_MX_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mexico [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_MX_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MEXICO</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated deficit</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SpaceBuildOutCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Space build-out costs.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SpaceBuildOutCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Space build-out costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PlacementAgentDerivativesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Placement Agent Derivatives.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PlacementAgentDerivativesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Placement Agent Derivatives [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of Shares Outstanding, end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Number of Shares Outstanding, beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeLaboratoryAndManufacturingSpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to office, laboratory and manufacturing space.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeLaboratoryAndManufacturingSpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Office Laboratory And Manufacturing Space</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">US [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Operating Activities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Grant Date Fair Value, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Term of Contract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term of lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Remaining Contractual Term (In years), Outstanding on September 30, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt term (in years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment, net</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NovemberFifteenTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">November Fifteen Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue, net of current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PlacementAgentWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Placement Agent Warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PlacementAgentWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Placement Agent Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Financial Assets and Liabilities at Fair value on a Recurring Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock, par value (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Options to Purchase Common Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Contract with Customer, Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive Securities, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAdditionalFundingAmountReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Collaborative Arrangement Additional Funding Amount Received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAdditionalFundingAmountReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement Additional Funding Amount Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAdditionalFundingAmountReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative arrangement additional funding amount received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares issuable for warrants outstanding (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of shares issuable for warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate gross sales amount of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expenses [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling, General and Administrative [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumBiddingPriceStockForLastThirtyConsecutiveBusinessDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum bidding price stock for last thirty consecutive business days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumBiddingPriceStockForLastThirtyConsecutiveBusinessDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Bidding Price Stock for Last Thirty Consecutive Business Days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumBiddingPriceStockForLastThirtyConsecutiveBusinessDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum bidding price stock for last thirty consecutive business days.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Components</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Net Loss Per Share Presented in Consolidated Statements of Operations and Comprehensive Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee-related Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued payroll and compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee-related Liabilities, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of Shares, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedules of Concentration of Risk, by Risk Factor [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Customers Represent Greater Than 10% Of Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation Approach and Technique</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series a convertible preferred stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Series A Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Line Items]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalents Items [Line Items]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_JuneThirtyTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">June Thirty Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CanaccordGenuityLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Canaccord Genuity LLC.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average risk-free interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Risk-free interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonUsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-US [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonUsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-US [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ClassOfWarrantOrRightExercisedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or right exercised, number.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ClassOfWarrantOrRightExercisedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right Exercised, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ClassOfWarrantOrRightExercisedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of warrants exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer B.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity of Counterparty, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of Shares Outstanding, Nonvested on September 30, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Number of Shares Outstanding, Nonvested on December 31, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FederalDepositInsuranceCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Federal deposit insurance corporation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FederalDepositInsuranceCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Federal Deposit Insurance Corporation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FederalDepositInsuranceCorporationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FDIC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities, net of current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InterestExpenseToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InterestExpenseToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense to Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InterestExpenseToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest expense to related party.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of loan to common and preferred stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Debt surrendered for cancellation in exchange for convertible preferred stock issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of debt to equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total notes payable to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographic Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographic Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Finished Goods, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finished goods</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital, Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WaiverAndConsentToTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Waiver and consent to term loan agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WaiverAndConsentToTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Waiver and Consent to Term Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MrSpragueMrGiffinAndMrGibbsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mr. Sprague, Mr. Giffin, and Mr. Gibbs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MrSpragueMrGiffinAndMrGibbsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr. Sprague, Mr. Giffin, and Mr. Gibbs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MrSpragueMrGiffinAndMrGibbsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mr. Sprague, Mr. Giffin, and Mr. Gibbs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockVotingRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock voting rights per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockVotingRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Voting Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockVotingRights_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock, voting rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of common stock from exercise of stock options (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares, Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentDeferredInterestRateInterestOnlyPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contractual deferred interest rate during interest only payments for funds borrowed, under the debt agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentDeferredInterestRateInterestOnlyPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Deferred Interest Rate Interest Only Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentDeferredInterestRateInterestOnlyPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred interest rate (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManufacturingFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Manufacturing Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManufacturingFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Manufacturing Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDateRangeStart1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date Range, Start</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDateRangeStart1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, maturity date start</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentPayableInCashQuarterlyPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument payable in cash quarterly percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentPayableInCashQuarterlyPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Payable in Cash Quarterly Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentPayableInCashQuarterlyPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payable in cash quarterly (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Balance Sheet Disclosures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Balance Sheet Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_UnauditedInterimFinancialInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for reporting unaudited interim financial information for the stated accounting period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_UnauditedInterimFinancialInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unaudited Interim Financial Information Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_UnauditedInterimFinancialInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unaudited Interim Financial Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Nonoperating Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentEventOfDefaultAdditionalInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional interest rate on all outstanding obligations during the occurrence and continuance of an event of default.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentEventOfDefaultAdditionalInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Event Of Default Additional Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentEventOfDefaultAdditionalInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional interest rate, event of default (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Furniture and Fixtures [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation of Revenue [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciliation of cash, cash equivalents and restricted cash at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred stock, shares issued to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of preferred stock sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange of preferred stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InstrumentRentalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Instrument rentals.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InstrumentRentalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Instrument Rentals [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InstrumentRentalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Instrument Rentals [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeLiabilitiesAtFairValueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Derivative Liabilities at Fair Value [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeLiabilitiesAtFairValueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Roll-Forward of Fair Value of Derivative Liability related to Term Loan with Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Net [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeRelatedToTermLoanWithRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of derivative related to Term Loan with related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeRelatedToTermLoanWithRelatedParty_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of derivative related to Term Loan with related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeRelatedToTermLoanWithRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Fair Value of Derivative Related to Term Loan with Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeRelatedToTermLoanWithRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of derivative related to Term Loan with related party.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedRoyaltiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Royalties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedRoyaltiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalties accrued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense and Other Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price Per Share, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Liquidation Preference, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock Liquidation Preference Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfAdditionalWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of additional warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfAdditionalWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Additional Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfAdditionalWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of additional warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_UnbilledAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unbilled accounts receivable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_UnbilledAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unbilled Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_UnbilledAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unbilled accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Share Price [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Price [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Series A and Series B Convertible Preferred Stock to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Temporary equity stock issued during period shares value new issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity Stock Issued During Period Shares Value New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CollaborativeArrangementDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CollaborativeArrangementDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">US Government Contract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NewSalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">New Sales Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NewSalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">New sales agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NewSalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Sales Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NewSalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Sales Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Shares, Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Consideration by Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent Consideration by Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementFirstContractOptionValueExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Collaborative arrangement first contract option value exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementFirstContractOptionValueExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement First Contract Option Value Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementFirstContractOptionValueExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First contract option value exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Benchmark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockShareSubscribedButUnissuedSubscriptionsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Share Subscribed but Unissued, Subscriptions Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockShareSubscribedButUnissuedSubscriptionsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate subscription amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sale of equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance or Sale of Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds from Issuance or Sale of Equity, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProductConsumablesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Product, consumables.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProductConsumablesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product Consumables [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProductConsumablesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product Consumables [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Cash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FebruaryTwoThousandAndTwentyThreePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">February two thousand and twenty three pre-funded warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FebruaryTwoThousandAndTwentyThreePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">February Two Thousand and Twenty Three Pre-Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_FebruaryTwoThousandAndTwentyThreePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 2023 Pre-Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total Product Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseExpirationDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseExpirationDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfSalesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Sales [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfSalesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of Product Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LegalEntityTypeOfCounterpartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity Type of Counterparty [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromAtTheMarketFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from at the market facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromAtTheMarketFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from At the Market Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromAtTheMarketFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from at the market facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Grant Date Fair Value, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ContributionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contribution.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ContributionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contribution [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ContributionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contribution [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Goods and Services Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of product revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cost of Goods and Services Sold, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalents [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Cash and Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2DxInstrumentsAndComponentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the T2Dx Instruments and components of instruments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2DxInstrumentsAndComponentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">T2 Dx Instruments And Components [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2DxInstrumentsAndComponentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">T2-Owned Instruments and Components [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation of Revenue [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation of Revenue by Major Source</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May 2024 pre-funded warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May 2024 Pre-Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromSecondaryOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from secondary offering, net of issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromSecondaryOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Secondary Offering, Net of Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromSecondaryOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from secondary offering, net of issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares available for grant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Presentation and Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SecondaryPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Secondary Public Offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SecondaryPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secondary Public Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SecondaryPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Secondary Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Grant Date Fair Value, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightWarrantIssuedInConnectionWithOfferingCostsOfMayTwoThousandTwentyFourPrivateOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Wainwright warrant issued in connection with offering costs of may two thousand twenty four private offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightWarrantIssuedInConnectionWithOfferingCostsOfMayTwoThousandTwentyFourPrivateOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wainwright Warrant Issued In Connection With Offering Costs Of May Two thousand Twenty Four Private Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightWarrantIssuedInConnectionWithOfferingCostsOfMayTwoThousandTwentyFourPrivateOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wainwright Warrant issued in connection with offering costs of May 2024 private offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares issuance of common stock to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Issuance Of Common Stock To Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock to related party (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementBasisAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Basis [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementBasisAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Statement Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expected term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Long-Term Debt Instruments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfAgentServiceFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of agent service fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfAgentServiceFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Agent Service Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfAgentServiceFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of agent service fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalents, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash and Cash Equivalents, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recent Accounting Standards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Attributable to Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Loss [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Stock Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance costs related to offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentUnaccruedPaidInKindInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument unaccrued paid in kind interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentUnaccruedPaidInKindInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Unaccrued Paid In Kind Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentUnaccruedPaidInKindInterest_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: unaccrued paid-in-kind interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockUponPreFundedWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period, value, issuance of common stock upon pre funded warrant exercises.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockUponPreFundedWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Issuance Of Common Stock Upon Pre Funded Warrant Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockUponPreFundedWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon Pre-Funded Warrant exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerFMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer F [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerFMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer F [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerFMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer F.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative liability related to Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative liability related to Term Loan, net of current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Derivative liability, noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The cash inflow (outflow) associated with the amount received from entity's first offering of stock to the public, net of issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Initial Public Offering Net Of Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from public offering, net of issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private Placement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CoDevelopmentPartnershipAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to a Co-Development Partnership Agreement with a third party to develop certain products.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CoDevelopmentPartnershipAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Co Development Partnership Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CoDevelopmentPartnershipAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Co Development Partnership Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction in Progress [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction in Progress [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares available for authorization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock from vesting of restricted stock, exercise of stock options and employee stock purchase plan (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MrSpragueAndMrGibbsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mr. Sprague and Mr. Gibbs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MrSpragueAndMrGibbsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mr Sprague And Mr Gibbs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MrSpragueAndMrGibbsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mr Sprague And Mr Gibbs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossValueGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award options grants in period gross value grant date fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossValueGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Value Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossValueGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate fair value of options granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfInstallmentsToPayRetentionBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of installments to pay retention bonus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfInstallmentsToPayRetentionBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Installments to Pay Retention Bonus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NumberOfInstallmentsToPayRetentionBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of installments to pay retention bonus.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price Per Share, Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAggregateConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of aggregate consideration receivable under collaborative arrangement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAggregateConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement Aggregate Consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAggregateConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate consideration receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockRedemptionPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Redemption Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockRedemptionPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, redemption price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock from secondary offering, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity stock issued during period shares new issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Stock Issued During Period Shares New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of Series A and Series B Convertible Preferred Stock into common stock by related party (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LessorAndLesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lessor and lessee, leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LessorAndLesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessor And Lessee, Leases [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LessorAndLesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Redemption of Series A Redeemable Preferred Stock issued to related party, (in Shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Redeemed or Called During Period, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, at Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash and Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2014AndInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock option plan 2014 and inducement plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2014AndInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Option Plan 2014 And Inducement Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2014AndInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2014 Stock Option Plan and Inducement Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommitmentsAndContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommitmentsAndContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommitmentsAndContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments And Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Research and Development Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment, Tax Withholding, Share-Based Payment Arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payment of employee restricted stock tax withholdings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of stock options granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant and Equipment, Gross, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Property, Plant and Equipment, Gross, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant and Equipment, Gross, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restrictions on Cash and Cash Equivalents [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Restricted Cash And Cash Equivalents [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ConversionPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Conversion price per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ConversionPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Price per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ConversionPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Term [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Term [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Estimated Assumptions Used to Calculate Weighted-Average Grant Date Fair Value of Options Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EstimateOfFairValueFairValueDisclosureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimate of Fair Value Measurement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EstimateOfFairValueFairValueDisclosureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimate of Fair Value Measurement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LaboratorySpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to laboratory space.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LaboratorySpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Laboratory Space [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LaboratorySpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Laboratory Space [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_AccruedFinalPaymentFeeOnTermLoanCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued final payment fee on term loan current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_AccruedFinalPaymentFeeOnTermLoanCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Final Payment Fee On Term Loan Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_AccruedFinalPaymentFeeOnTermLoanCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued final payment fee on Term Loan with related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LicenseFeesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the amount of annual licensing fees agreed to be paid by the company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LicenseFeesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Fees Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LicenseFeesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Annual license fee payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NatureOfBusinessLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Nature of business line items.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NatureOfBusinessLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature Of Business [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NatureOfBusinessLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nature Of Business [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instruments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrant or Right [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loan Agreement due 2025 including PIK interest,before unamortized discount and issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument carrying amount including paid in kind interest before unamortized discount and issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Carrying Amount Including Paid In Kind Interest Before Unamortized Discount And Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total including PIK interest, before unamortized discount and issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Date from which Warrants or Rights Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercisable date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSoldDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost, Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSoldDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense recorded from instuments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CoDevelopmentPartnershipAgreementOptionThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Co Development Partnership Agreement Option Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CoDevelopmentPartnershipAgreementOptionThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Co Development Partnership Agreement Option Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CoDevelopmentPartnershipAgreementOptionThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Co Development Partnership Agreement Option Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Nonvested Restricted Stock Units Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Revenue from Contract with Customer, Excluding Assessed Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer, Excluding Assessed Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodRedemptionShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Redemption of Series A Redeemable Preferred Stock issued to related party (in Shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodRedemptionShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity Stock Issued During Period Redemption Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodRedemptionShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Temporary equity stock issued during period redemption shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeaseExpirationMonthAndYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease expiration month and year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeaseExpirationMonthAndYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Expiration Month And Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeaseExpirationMonthAndYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease expiration month and year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsNoteDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Note Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling, general and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Selling, General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesBPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series B Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeriesBPreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer C.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CustomerCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_GeographicInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Geographic information.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_GeographicInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographic Information Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_GeographicInformationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographic Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization, Nonproduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Depletion and Amortization, Nonproduction, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EmployeeAndNonemployeeStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee and nonemployee stock options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EmployeeAndNonemployeeStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee And Nonemployee Stock Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EmployeeAndNonemployeeStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accounts Payable, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities and stockholders' deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Financing Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CrgAndAffiliatedEntitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CRG and Affiliated Entities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CrgAndAffiliatedEntitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CRG and Affiliated Entities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CrgAndAffiliatedEntitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">CRG and affiliated entities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to an agreement with a third party for licensing.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Anti-dilutive securities excluded from the computation of diluted net loss per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesBRedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesBRedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series b redeemable convertible preferred stock member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesBRedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series B Redeemable Convertible Preferred Stock Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">APIC, Share-Based Payment Arrangement, Increase for Cost Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Conversion, Converted Instrument, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentAmount1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate purchase price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Consideration Received on Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total proceeds from offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LandlordMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Landlord.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LandlordMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Landlord [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses and other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total accrued expenses and other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative liability related to Term Loan with related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_RoyaltyOnNetSalesSublicensingGrossRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty on net sales sublicensing gross revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_RoyaltyOnNetSalesSublicensingGrossRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty On Net Sales Sublicensing Gross Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_RoyaltyOnNetSalesSublicensingGrossRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty on net sales sublicensing gross revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders&#8217; deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Stockholders' deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Series A and Series B Convertible Preferred Stock to related party (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity Stock Issued During Period Shares New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Temporary equity stock issued during period shares new issues.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ComponentOfCommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Component of common stock capital shares reserved for future issuance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ComponentOfCommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Component Of Common Stock Capital Shares Reserved For Future Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ComponentOfCommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares available for future issuance under stock incentive plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2OwnedInstrumentsInServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the T2dx Instruments in service.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2OwnedInstrumentsInServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">T2 Owned Instruments In Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2OwnedInstrumentsInServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">T2 Owned Instruments in Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units (RSUs) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of shares sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Number of Shares Issued in Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares issued/sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Property Plant And Equipment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expenses, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling, General and Administrative Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock-Based Compensation Expense for Stock Options Granted that was Recorded in the Company's Results of Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature of Operations [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nature of Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Discount Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input, Discount Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security deposit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecurityDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security deposit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost related to non-vested stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Laboratory Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityDistributionAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Distribution Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityDistributionAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Distribution Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityDistributionAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity distribution agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of long-term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds from Issuance of Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total revenue (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total accounts receivable (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of Series B Convertible Preferred Stock into common stock by related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Conversion of Convertible Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Price Volatility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Volatility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Derivative Instruments, Net, Pretax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Derivative Instruments, Net, Pretax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of derivatives with placement agent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EntityAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EntityAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EntityAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Entity A member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period shares issuance of common stock and pre funded warrant upon public offering, net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Issuance Of Common Stock And Pre Funded Warrant Upon Public Offering Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock and Pre-Funded Warrant from public offering, net (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EstimatedLiabilityPertainingToLease_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated liability pertaining to lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EstimatedLiabilityPertainingToLease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Liability Pertaining to Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EstimatedLiabilityPertainingToLease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated liability pertaining to lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected dividend yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeLiabilityRelatedToTermLoanWithRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative liability related to Term Loan with related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeLiabilityRelatedToTermLoanWithRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability Related to Term Loan with Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeLiabilityRelatedToTermLoanWithRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Derivative liability related to Term Loan with related party.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Risk Free Interest Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free Interest Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromExternalCustomersByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Schedule of Customers Represent Greater Than 10% Of Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromExternalCustomersByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Entities and Customers Represent Greater Than 10% Of Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromExternalCustomersByGeographicAreasTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from External Customers by Geographic Areas [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesAWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less accumulated depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ScenarioOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent Interest Beginning in Q4 2024 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ScenarioOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Scenario one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ScenarioOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Software and Software Development Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Software [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_IncreaseDecreaseInOperatingLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of increase (decrease) in operating lease liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_IncreaseDecreaseInOperatingLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Operating Lease Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_IncreaseDecreaseInOperatingLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average fair value of options granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OriginalExpectedPeriodOfContractsForWhichValueOfUnsatisfiedPerformanceObligationsNotToBeDisclosed_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Original expected period of contracts for which value of unsatisfied performance obligations not to be disclosed.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OriginalExpectedPeriodOfContractsForWhichValueOfUnsatisfiedPerformanceObligationsNotToBeDisclosed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Original Expected Period Of Contracts For Which Value Of Unsatisfied Performance Obligations Not To Be Disclosed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OriginalExpectedPeriodOfContractsForWhichValueOfUnsatisfiedPerformanceObligationsNotToBeDisclosed_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Original expected period of contracts for which value of unsatisfied performance obligations not to be disclosed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares converted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Conversion of Stock, Shares Converted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders' deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosures of cash flow information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold Improvements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold Improvements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CashCashEquivalentsMarketableSecuritiesAndRestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cash, cash equivalents, marketable securities and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CashCashEquivalentsMarketableSecuritiesAndRestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash, cash equivalents marketable securities and restricted cash.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CashCashEquivalentsMarketableSecuritiesAndRestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Cash Equivalents Marketable Securities And Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CashCashEquivalentsMarketableSecuritiesAndRestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, cash equivalents, marketable securities and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAdditionalFundingAmountToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Collaborative arrangement additional funding amount to be received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAdditionalFundingAmountToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement Additional Funding Amount To Be Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CollaborativeArrangementAdditionalFundingAmountToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative arrangement additional funding amount to be received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reverse stock split rounding adjustment (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock issued during period, shares, stock splits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasedT2OwnedInstrumentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leased T2-owned instruments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasedT2OwnedInstrumentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leased T2 Owned Instruments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_LeasedT2OwnedInstrumentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Leased T2 Owned Instruments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ExerciseOfWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exercise of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ExerciseOfWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exercise Of Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ExerciseOfWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trading days.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Receivable, after Allowance for Credit Loss, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NatureOfBusinessTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Nature of business table.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NatureOfBusinessTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature Of Business [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NatureOfBusinessTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nature Of Business [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Investing Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeResearchLaboratoryAndManufacturingSpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Office Research Laboratory and Manufacturing Space.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeResearchLaboratoryAndManufacturingSpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Office Research Laboratory And Manufacturing Space [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OfficeResearchLaboratoryAndManufacturingSpaceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Office, Research, Laboratory and Manufacturing Space [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock from secondary offering, net (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of shares issued/sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SettlementOfWarrantDueToCashlessExercise_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Settlement of warrant due to cashless exercise.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SettlementOfWarrantDueToCashlessExercise_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Settlement Of Warrant Due To Cashless Exercise</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SettlementOfWarrantDueToCashlessExercise_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Settlement due to cashless exercise</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProductInstrumentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Product, instruments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProductInstrumentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product Instruments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProductInstrumentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product Instruments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ClassOfWarrantOrRightMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or right maturity date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ClassOfWarrantOrRightMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ClassOfWarrantOrRightMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants maturity term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Each Warrant or Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of securities called by each warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponPreFundedWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period, shares, issuance of common stock upon pre funded warrant exercises.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponPreFundedWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Issuance Of Common Stock Upon Pre Funded Warrant Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponPreFundedWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon Pre-Funded Warrant exercises (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of vested stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_OperatingLeasesEnteredIntoMay2013Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to operating leases entered into May 2013.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SupplementalBalanceSheetInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Supplemental balance sheet information.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SupplementalBalanceSheetInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Balance Sheet Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A redeemable convertible preferred stock, par value (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Payment Arrangement, Noncash Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate Intrinsic Value, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_BiomedicalAdvancedResearchAndDevelopmentAuthorityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Entity A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_BiomedicalAdvancedResearchAndDevelopmentAuthorityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Biomedical Advanced Research and Development Authority.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_BiomedicalAdvancedResearchAndDevelopmentAuthorityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Biomedical Advanced Research and Development Authority [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesBCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series B Common Stock Warrant</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValuesIssuanceOfCommonStockToRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period values issuance of common stock to related party</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_IssuanceCostsRelatedToCommonStockWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance costs related to Common Stock Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_AmendedAndRestated2006EmployeeDirectorAndConsultantStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2006 Plan [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_AmendedAndRestated2006EmployeeDirectorAndConsultantStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amended and Restated 2006 Employee, Director and Consultant Stock Plan.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Wainwright warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wainwright Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wainwright Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Money Market Funds [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesBConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B Convertible Preferred Stock [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SecurityDepositReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Security deposit received.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsNotSettleableInCashFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at Beginning</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Remaining Contractual Term, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Loss Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCashFeeAgainstAggregateGrossExcercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of cash fee against aggregate gross excercise price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCashFeeAgainstAggregateGrossExcercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Cash Fee against Aggregate Gross Excercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCashFeeAgainstAggregateGrossExcercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of cash fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Impairment, Long-Lived Asset, Held-for-Use, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment, Long-Lived Asset, Held-for-Use</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loss on impairment of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TransferOfT2OwnedInstrumentsAndComponentsToFromInventory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfer of T2 owned instruments and components from inventory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TransferOfT2OwnedInstrumentsAndComponentsToFromInventory_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transfer of T2 owned instruments and components to (from) inventory.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TransferOfT2OwnedInstrumentsAndComponentsToFromInventory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transfer Of T2 Owned Instruments And Components To From Inventory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of Long-Lived Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock from vesting of restricted stock, exercise of stock options and employee stock purchase plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeWarrantLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeWarrantLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Warrant Liabilities Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeWarrantLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Derivative warrant liabilities current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds allocated to warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonShareAndMay2024CommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Share And May 2024 Common Stock Warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonShareAndMay2024CommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Share And May 2024 Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonShareAndMay2024CommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common Share and May 2024 Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock Option Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_GoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Going concern</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_GoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Going concern [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_GoingConcernPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Going Concern</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InducementAwardPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Inducement award plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InducementAwardPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inducement Award Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_InducementAwardPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inducement Award Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Raw Materials, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Raw materials</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock awards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Stock Awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_JulyThirtyOneTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 31, 2023 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_JulyThirtyOneTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">July Thirty One Two Thousand Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_JulyThirtyOneTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">July thirty one two thousand twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Property and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Remaining Contractual Term, Vested or expected to vest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreferredStockAggregateNumberOfVotes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Preferred stock, aggregate number of votes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreferredStockAggregateNumberOfVotes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Aggregate number of Votes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PreferredStockAggregateNumberOfVotes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, aggregate number of votes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockWarrantUponCashlessExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period, shares, issuance of common stock warrant upon cashless exercises.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockWarrantUponCashlessExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Issuance Of Common Stock Warrant Upon Cashless Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockWarrantUponCashlessExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon Common Stock Warrant cashless exercises (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Adjustment of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Change in fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net change in cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants outstanding, term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermOfLease_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term of lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermOfLease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Of Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermOfLease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term of lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IPOMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IPO [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IPOMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightContingentWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Wainwright contingent warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightContingentWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wainwright Contingent Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightContingentWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wainwright Contingent Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stated value purchase price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Professional Fees, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued professional services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2DxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">T2 Dx.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2DxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">T2 Dx [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_T2DxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">T2 Dx [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Estimated Fair Value of the Warrant Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Effective Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Remaining Contractual Term, Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of derivative warrant liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change In Fair Value Of Derivative Warrant Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ChangeInFairValueOfDerivativeWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Contract with Customer, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2006Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock Option Plan 2006 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2006Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Option Plan2006 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlan2006Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2006 Stock Option Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaytwoThousandTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May 2024 Pre-Funded Warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaytwoThousandTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MayTwo Thousand Twenty Four Pre-Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaytwoThousandTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">May 2024 Pre-Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, $0.001 par value; 10,000,000 shares authorized: Series B Convertible Preferred Stock, 0 shares designated on September 30, 2024, 0 and 93,297 shares issued and outstanding to related party on September 30, 2024 and December 31, 2023, respectively</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred stock value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares, Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumAmountOfAnnualEmployeeCommonStockPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum amount of annual employee common stock purchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumAmountOfAnnualEmployeeCommonStockPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Amount Of Annual Employee Common Stock Purchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumAmountOfAnnualEmployeeCommonStockPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum amount of annual employee common stock purchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeLiabilitiesWithPlacementAgent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Derivative liabilities with placement agent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeLiabilitiesWithPlacementAgent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liabilities with Placement Agent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_DerivativeLiabilitiesWithPlacementAgent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative liabilities with placement agent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Expenditures Incurred but Not yet Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases of property and equipment included in accounts payable and accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, cash equivalents and restricted cash at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, cash equivalents and restricted cash at beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants outstanding, measurement input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassifications</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification, Comparability Adjustment [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024CommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May 2024 Common Stock Warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024CommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May 2024 Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024CommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 2024 Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MinimumLiquidityCovenantWaiverExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum liquidity covenant, waiver expiration date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MinimumLiquidityCovenantWaiverExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Liquidity Covenant Waiver Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MinimumLiquidityCovenantWaiverExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum liquidity covenant, waiver expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfRoyaltyOnNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of royalty on net sales.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfRoyaltyOnNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Royalty On Net Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfRoyaltyOnNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of royalty on net sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares Converted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of Series B Convertible Preferred Stock into common stock by related party, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Conversion of Convertible Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares outstanding to related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Preferred Stock, Shares Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Preferred Stock, Shares Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GuaranteesIndemnificationsAndWarrantiesPolicies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Guarantees, Indemnifications and Warranties Policies [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GuaranteesIndemnificationsAndWarrantiesPolicies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Guarantees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteRedeemablePreferredStockIssuePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Classification of Series A Redeemable Preferred Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteRedeemablePreferredStockIssuePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity Note, Redeemable Preferred Stock, Issue, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IT_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ITALY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IT_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Italy [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumPotentialCashPayoutOfCashFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum potential cash payout of cash fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumPotentialCashPayoutOfCashFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Potential Cash Payout of Cash Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaximumPotentialCashPayoutOfCashFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum potential cash payout of cash fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ContributionRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contribution revenue.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expenses and Other Current Assets [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of full share price paid in purchase of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesARedeemablePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A redeemable preferred stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesARedeemablePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Redeemable Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation Approach and Technique</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Security, Excluded EPS Calculation [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NovemberFifteenTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">November fifteen two thousand twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NovemberFifteenTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">November Fifteen Two Thousand Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_NovemberFifteenTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 15, 2023 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price Per Share, Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: unamortized discount and deferred issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum cash balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Minimum cash covenant after reduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period value issuance of common stock and pre funded warrant upon public offering, net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Issuance Of Common Stock And Pre Funded Warrant Upon Public Offering Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock and Pre-Funded Warrant from public offering, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate Intrinsic Value, Vested or expected to vest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted-Average Grant Date Fair Value Outstanding, Nonvested on September 30, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted-Average Grant Date Fair Value Outstanding, Nonvested on December 31, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset, Periodic Reduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash lease expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityStockIssuedDuringPeriodValuesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity stock issued during period values new issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityStockIssuedDuringPeriodValuesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Stock Issued During Period Values New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_EquityStockIssuedDuringPeriodValuesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of Series A and Series B Convertible Preferred Stock into common stock by related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net loss to net cash used in operating activities:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Inventory, Current [Table Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CRGMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">CRG.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CRGMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">C R G [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CRGMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CRG [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation of Revenue [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_WainwrightEquityDistributionAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Wainwright equity distribution agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenAndInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock option plans two thousand and six and two thousand and fourteen and inducement plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenAndInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Option Plans Two Thousand And Six And Two Thousand And Fourteen And Inducement Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenAndInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2006 and 2014 Stock Option Plans and Inducement Plan [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Domain]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Disposition of Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on disposal of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024PreFundedWarrantsAndMay2024CommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May 2024 Pre-Funded Warrants and May 2024 Common Stock Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024PreFundedWarrantsAndMay2024CommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May 2024 Pre-Funded Warrants and May 2024 Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_May2024PreFundedWarrantsAndMay2024CommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 2024 Pre-Funded Warrant and May 2024 Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income (expense):</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommitmentsAndContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommitmentsAndContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommitmentsAndContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Consideration Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent Consideration Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PayableOfRetentionBonusInEachInstallment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payable of retention bonus in each installment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PayableOfRetentionBonusInEachInstallment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payable of Retention Bonus in Each Installment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PayableOfRetentionBonusInEachInstallment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payable of retention bonus in each installment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Lease, Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Accrued Liabilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Components of Accrued Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (see Note 14)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ExpectedMinimumHoldingPercentageInOutstandingCommonStockAfterConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected minimum holding percentage in outstanding common stock after conversion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ExpectedMinimumHoldingPercentageInOutstandingCommonStockAfterConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Expected Minimum Holding Percentage in Outstanding Common Stock After Conversion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ExpectedMinimumHoldingPercentageInOutstandingCommonStockAfterConversion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Expected minimum holding percentage in outstanding common stock after conversion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MinimumMarketValueOfListedSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum market value of listed securities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MinimumMarketValueOfListedSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Market Value Of Listed Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MinimumMarketValueOfListedSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum market value of listed securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SupplementalBalanceSheetInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Supplemental Balance Sheet Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SupplementalBalanceSheetInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Balance Sheet Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SupplementalBalanceSheetInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Balance Sheet Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted-average number of shares, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average number of common shares used in computing net loss per share - diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Outstanding receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Receivable, after Allowance for Credit Loss, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares, Vested or expected to vest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Inventories, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ScheduleOfFairValueOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of fair value of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ScheduleOfFairValueOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Fair Value Of Warrants [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ScheduleOfFairValueOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Roll-forward of Fair Value of Common Stock Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockMarketValueMinimumRequiredForContinuedListing_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock market value minimum required for continued listing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockMarketValueMinimumRequiredForContinuedListing_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Market Value Minimum Required for Continued Listing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_StockMarketValueMinimumRequiredForContinuedListing_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock market value minimum required for continued listing.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonShareAndCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common share and common stock warrant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_CommonShareAndCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Share and Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceInitialPrivateOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from private offering, net of issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceInitialPrivateOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Initial Private Offering Net Of Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceInitialPrivateOfferingNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from private offering, net of issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermLoanWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermLoanWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_TermLoanWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loan Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesACommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A Common Stock Warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_SeriesACommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfWorkforceReduction_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of workforce reduction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfWorkforceReduction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Workforce Reduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfWorkforceReduction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of workforce reduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductionRelatedImpairmentsOrCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductionRelatedImpairmentsOrCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Production Related Impairments or Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProductionRelatedImpairmentsOrCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Production Related Impairments or Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_RetentionBonusPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Retention Bonus Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_RetentionBonusPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retention Bonus Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_RetentionBonusPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retention bonus payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Issued for Services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity Note, Stock Split, Conversion Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock split, conversion ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceOfSharesFromEmployeeStockPurchasePlanAndStockOptionExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of shares from employee stock purchase plan and stock option exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceOfSharesFromEmployeeStockPurchasePlanAndStockOptionExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Shares From Employee Stock Purchase Plan And Stock Option Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_ProceedsFromIssuanceOfSharesFromEmployeeStockPurchasePlanAndStockOptionExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of shares from employee stock purchase plan and stock option exercises.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCommonSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of common share outstanding, as it relates to the number of shares reserved for future issuance calculation under the 2014 Stock Incentive Plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCommonSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Common Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_PercentageOfCommonSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of common shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaintenanceServiceTermOfAdditionalPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The additional term for maintenance services on purchased product (which include warranty, maintenance, and technical support services) that may be purchased for additional consideration, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaintenanceServiceTermOfAdditionalPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maintenance Service Term Of Additional Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ttoo_MaintenanceServiceTermOfAdditionalPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional period for Maintenance Service option (in years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Financing Activities [Abstract]</link:label>
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          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
          <link:loc xlink:type="locator" xlink:href="ttoo-20240930.xsd#ttoo_AccruedClinicalTrialAndDevelopmentExpenses" xlink:label="ttoo_AccruedClinicalTrialAndDevelopmentExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="us-gaap_AccruedProfessionalFeesCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestPayableCurrent" xlink:label="us-gaap_InterestPayableCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.t2biosystems.com/20240930/taxonomy/role/Role_DisclosureNotesPayableScheduleOfDebtDetail">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NotesPayable" xlink:to="ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts" order="0" weight="1.00" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NotesPayable" xlink:to="ttoo_DebtInstrumentUnaccruedPaidInKindInterest" order="1" weight="-1.00" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NotesPayable" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" order="2" weight="-1.00" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NotesPayable" xlink:label="us-gaap_NotesPayable"/>
          <link:loc xlink:type="locator" xlink:href="ttoo-20240930.xsd#ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts" xlink:label="ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts"/>
          <link:loc xlink:type="locator" xlink:href="ttoo-20240930.xsd#ttoo_DebtInstrumentUnaccruedPaidInKindInterest" xlink:label="ttoo_DebtInstrumentUnaccruedPaidInKindInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
        </link:calculationLink>
      </link:linkbase>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="ttoo_HCWainwrightCoLLCMember" name="HCWainwrightCoLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_OfficeResearchLaboratoryAndManufacturingSpaceMember" name="OfficeResearchLaboratoryAndManufacturingSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PreFundedWarrantAndCommonStockWarrantMember" name="PreFundedWarrantAndCommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PercentageOfMinimumCommonStockOutstanding" name="PercentageOfMinimumCommonStockOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_GeographicInformationPolicyTextBlock" name="GeographicInformationPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CoDevelopmentPartnershipAgreementOptionThreeMember" name="CoDevelopmentPartnershipAgreementOptionThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PlacementAgentWarrantMember" name="PlacementAgentWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockAwardsMember" name="StockAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_MinimumMarketValueOfListedSecurities" name="MinimumMarketValueOfListedSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockToRelatedParty" name="StockIssuedDuringPeriodSharesIssuanceOfCommonStockToRelatedParty" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CustomerEMember" name="CustomerEMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossValueGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrossValueGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_OperatingLeasesEnteredIntoMay2013Member" name="OperatingLeasesEnteredIntoMay2013Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_OfficeAndLaboratorySpaceMember" name="OfficeAndLaboratorySpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_MaximumLeasePeriodToNotRecognizeRightOfUseAssetsOrLeaseLiabilities" name="MaximumLeasePeriodToNotRecognizeRightOfUseAssetsOrLeaseLiabilities" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CanaccordGenuityLLCMember" name="CanaccordGenuityLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_May2024PreFundedWarrantsMember" name="May2024PreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ProbabilityWeightedDiscountedCashFlowModelMember" name="ProbabilityWeightedDiscountedCashFlowModelMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodValuesIssuanceOfCommonStockToRelatedParty" name="StockIssuedDuringPeriodValuesIssuanceOfCommonStockToRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts" name="ProceedsFromIssuanceInitialPublicOfferingNetOfIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_CustomerAMember" name="CustomerAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CollaborativeArrangementAdditionalFundingAmountReceived" name="CollaborativeArrangementAdditionalFundingAmountReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_MaintenanceServiceTermOfAdditionalPeriod" name="MaintenanceServiceTermOfAdditionalPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_LicenseFeesPayable" name="LicenseFeesPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_TermLoanWarrantsMember" name="TermLoanWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CustomerDMember" name="CustomerDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CustomerCMember" name="CustomerCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CostOfProductRevenuePolicyTextBlock" name="CostOfProductRevenuePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_DebtInstrumentDeferredInterestRateInterestOnlyPayment" name="DebtInstrumentDeferredInterestRateInterestOnlyPayment" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_MaytwoThousandTwentyFourPreFundedWarrantsMember" name="MaytwoThousandTwentyFourPreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PreferredStockAggregateNumberOfVotes" name="PreferredStockAggregateNumberOfVotes" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_ProceedsFromIssuanceOfCommonStockGross" name="ProceedsFromIssuanceOfCommonStockGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_TemporaryEquityStockIssuedDuringPeriodRedemptionShares" name="TemporaryEquityStockIssuedDuringPeriodRedemptionShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_DebtInstrumentPayableInCashQuarterlyPercentage" name="DebtInstrumentPayableInCashQuarterlyPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_ProceedsFromIssuanceOfSharesFromEmployeeStockPurchasePlanAndStockOptionExercises" name="ProceedsFromIssuanceOfSharesFromEmployeeStockPurchasePlanAndStockOptionExercises" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_OperatingLeaseTerminationMember" name="OperatingLeaseTerminationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CashCashEquivalentsMarketableSecuritiesAndRestrictedCash" name="CashCashEquivalentsMarketableSecuritiesAndRestrictedCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_InducementAwardPlanMember" name="InducementAwardPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_GoingConcernPolicyTextBlock" name="GoingConcernPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_TradingDays" name="TradingDays" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_SeriesACommonStockWarrantMember" name="SeriesACommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_DerivativeWarrantLiabilitiesCurrent" name="DerivativeWarrantLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_ChangeInFairValueOfDerivativeRelatedToTermLoanWithRelatedParty" name="ChangeInFairValueOfDerivativeRelatedToTermLoanWithRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_StockOptionPlan2014Member" name="StockOptionPlan2014Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PayableOfRetentionBonusInEachInstallment" name="PayableOfRetentionBonusInEachInstallment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodValuesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet" name="StockIssuedDuringPeriodValuesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_ScheduleOfFairValueOfWarrantsTableTextBlock" name="ScheduleOfFairValueOfWarrantsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CollaborativeArrangementOptionContractValueExercised" name="CollaborativeArrangementOptionContractValueExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_BiomedicalAdvancedResearchAndDevelopmentAuthorityMember" name="BiomedicalAdvancedResearchAndDevelopmentAuthorityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ScenarioOneMember" name="ScenarioOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SecondaryPublicOfferingMember" name="SecondaryPublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NatureOfBusinessLineItems" name="NatureOfBusinessLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CRGMember" name="CRGMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_TermLoanAgreementMember" name="TermLoanAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_OperatingLeasesEnteredIntoAugust2010Member" name="OperatingLeasesEnteredIntoAugust2010Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NovemberFifteenTwoThousandTwentyThreeMember" name="NovemberFifteenTwoThousandTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CoDevelopmentPartnershipAgreementMember" name="CoDevelopmentPartnershipAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_JuneThirtyTwoThousandTwentyThreeMember" name="JuneThirtyTwoThousandTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ChangeInFairValueOfDerivativeWarrantLiability" name="ChangeInFairValueOfDerivativeWarrantLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_CustomerBMember" name="CustomerBMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_DerivativeLiabilitiesWithPlacementAgent" name="DerivativeLiabilitiesWithPlacementAgent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_CommonShareAndMay2024CommonStockWarrantMember" name="CommonShareAndMay2024CommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_RetentionBonusPayable" name="RetentionBonusPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_PaidInKindInterestExpenseToRelatedParty" name="PaidInKindInterestExpenseToRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_CommitmentsAndContingenciesTable" name="CommitmentsAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_MaintenanceServicePeriod" name="MaintenanceServicePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_FairValueDerivativeLiabilityDiscountRate" name="FairValueDerivativeLiabilityDiscountRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_WaiverAndConsentToTermLoanAgreementMember" name="WaiverAndConsentToTermLoanAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ConversionPricePerShare" name="ConversionPricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_SeriesARedeemablePreferredStockMember" name="SeriesARedeemablePreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PercentageOfCommonSharesOutstanding" name="PercentageOfCommonSharesOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_ContributionMember" name="ContributionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_InstrumentRentalsMember" name="InstrumentRentalsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CommonShareAndCommonStockWarrantMember" name="CommonShareAndCommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_OfficeSpaceLaboratorySpaceAndEquipmentMember" name="OfficeSpaceLaboratorySpaceAndEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SeriesAAndSeriesBRedeemableConvertiblePreferredStockMember" name="SeriesAAndSeriesBRedeemableConvertiblePreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_IssuanceCostsRelatedToCommonStockWarrants" name="IssuanceCostsRelatedToCommonStockWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts" name="DebtInstrumentCarryingAmountIncludingPaidInKindInterestBeforeUnamortizedDiscountAndIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_UnbilledAccountsReceivable" name="UnbilledAccountsReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_MaximumBiddingPriceStockForLastThirtyConsecutiveBusinessDays" name="MaximumBiddingPriceStockForLastThirtyConsecutiveBusinessDays" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_NatureOfBusinessTable" name="NatureOfBusinessTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NumberOfContractPaymentTerm" name="NumberOfContractPaymentTerm" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_LaboratorySpaceMember" name="LaboratorySpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_LeasedT2OwnedInstrumentsMember" name="LeasedT2OwnedInstrumentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet" name="StockIssuedDuringPeriodSharesIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_PaymentForLegalHearingFee" name="PaymentForLegalHearingFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_PlacementAgentDerivativesMember" name="PlacementAgentDerivativesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SettlementOfWarrantDueToCashlessExercise" name="SettlementOfWarrantDueToCashlessExercise" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_CrgAndAffiliatedEntitiesMember" name="CrgAndAffiliatedEntitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_WainwrightWarrantIssuedInConnectionWithOfferingCostsOfMayTwoThousandTwentyFourPrivateOffering" name="WainwrightWarrantIssuedInConnectionWithOfferingCostsOfMayTwoThousandTwentyFourPrivateOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_StockholdersEquityNoteWarrantsOrRightsDisclosureTextBlock" name="StockholdersEquityNoteWarrantsOrRightsDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_May2024PreFundedWarrantsAndMay2024CommonStockWarrantsMember" name="May2024PreFundedWarrantsAndMay2024CommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NovemberFifteenTwoThousandTwentyFourMember" name="NovemberFifteenTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ContributionRevenueMember" name="ContributionRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PercentageOfAgentServiceFee" name="PercentageOfAgentServiceFee" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_ComponentOfCommonStockCapitalSharesReservedForFutureIssuance" name="ComponentOfCommonStockCapitalSharesReservedForFutureIssuance" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_MaximumPotentialCashPayoutOfCashFee" name="MaximumPotentialCashPayoutOfCashFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_SeriesBCommonStockWarrantMember" name="SeriesBCommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenMember" name="StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockMarketValueMinimumRequiredForContinuedListing" name="StockMarketValueMinimumRequiredForContinuedListing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesValueNewIssues" name="TemporaryEquityStockIssuedDuringPeriodSharesValueNewIssues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet" name="StockIssuedDuringPeriodValueIssuanceOfCommonStockAndPreFundedWarrantUponPublicOfferingNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_AccruedFinalPaymentFeeOnTermLoanCurrent" name="AccruedFinalPaymentFeeOnTermLoanCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_JulyThirtyOneTwoThousandTwentyThreeMember" name="JulyThirtyOneTwoThousandTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SpaceBuildOutCosts" name="SpaceBuildOutCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_SeriesBConvertiblePreferredStockMember" name="SeriesBConvertiblePreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PlacementAgentCommonStockWarrantsMember" name="PlacementAgentCommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PercentageOfCashFeeAgainstAggregateGrossExcercisePrice" name="PercentageOfCashFeeAgainstAggregateGrossExcercisePrice" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponPreFundedWarrantExercises" name="StockIssuedDuringPeriodSharesIssuanceOfCommonStockUponPreFundedWarrantExercises" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CommonStockNumberOfVotesPerShare" name="CommonStockNumberOfVotesPerShare" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_ProceedsFromSecondaryOfferingNetOfIssuanceCosts" name="ProceedsFromSecondaryOfferingNetOfIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_RoyaltyOnNetSalesSublicensingGrossRevenue" name="RoyaltyOnNetSalesSublicensingGrossRevenue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_StockOptionPlan2014AndInducementPlanMember" name="StockOptionPlan2014AndInducementPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ClassOfWarrantOrRightExercisedNumber" name="ClassOfWarrantOrRightExercisedNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_LessorAndLesseeLeasesPolicyTextBlock" name="LessorAndLesseeLeasesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_FebruaryTwoThousandAndTwentyThreePreFundedWarrantsMember" name="FebruaryTwoThousandAndTwentyThreePreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_TermOfLease" name="TermOfLease" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_AccruedClinicalTrialAndDevelopmentExpenses" name="AccruedClinicalTrialAndDevelopmentExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_MrSpragueAndMrGibbsMember" name="MrSpragueAndMrGibbsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PercentageOfCommonStockOutstanding" name="PercentageOfCommonStockOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_TransferOfT2OwnedInstrumentsAndComponentsToFromInventory" name="TransferOfT2OwnedInstrumentsAndComponentsToFromInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_LicenseAgreementMember" name="LicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CollaborativeArrangementAggregateConsideration" name="CollaborativeArrangementAggregateConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_WainwrightEquityDistributionAgreementMember" name="WainwrightEquityDistributionAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockUponPreFundedWarrantExercises" name="StockIssuedDuringPeriodValueIssuanceOfCommonStockUponPreFundedWarrantExercises" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodValueIssuanceOfCommonStockWarrantUponCashlessExercises" name="StockIssuedDuringPeriodValueIssuanceOfCommonStockWarrantUponCashlessExercises" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_DerivativeLiabilityRelatedToTermLoanWithRelatedParty" name="DerivativeLiabilityRelatedToTermLoanWithRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_T2OwnedInstrumentsInServiceMember" name="T2OwnedInstrumentsInServiceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CollaborativeArrangementFirstContractOptionValueExercised" name="CollaborativeArrangementFirstContractOptionValueExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_EquityDistributionAgreementMember" name="EquityDistributionAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_LeasesLineItems" name="LeasesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SeriesARedeemableConvertiblePreferredStockMember" name="SeriesARedeemableConvertiblePreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" name="TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_EstimatedLiabilityPertainingToLease" name="EstimatedLiabilityPertainingToLease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_ProceedsFromIssuanceInitialPrivateOfferingNetOfIssuanceCosts" name="ProceedsFromIssuanceInitialPrivateOfferingNetOfIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_MrSpragueMrGiffinAndMrGibbsMember" name="MrSpragueMrGiffinAndMrGibbsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodGrossValueGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodGrossValueGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_MaximumAmountOfAnnualEmployeeCommonStockPurchase" name="MaximumAmountOfAnnualEmployeeCommonStockPurchase" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_EmployeeAndNonemployeeStockOptionsMember" name="EmployeeAndNonemployeeStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_AmendedAndRestated2006EmployeeDirectorAndConsultantStockPlanMember" name="AmendedAndRestated2006EmployeeDirectorAndConsultantStockPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NovemberThirtyTwoThousandTwentyThreeMember" name="NovemberThirtyTwoThousandTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SeriesAConvertiblePreferredStockMember" name="SeriesAConvertiblePreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet" name="StockIssuedDuringPeriodSharesIssuanceOfCommonStockPreFundedWarrantsAndSeriesAAndSeriesBCommonStockWarrantsFromPrivatePlacementNet" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_ProductConsumablesMember" name="ProductConsumablesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_OriginalExpectedPeriodOfContractsForWhichValueOfUnsatisfiedPerformanceObligationsNotToBeDisclosed" name="OriginalExpectedPeriodOfContractsForWhichValueOfUnsatisfiedPerformanceObligationsNotToBeDisclosed" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_IncreaseDecreaseInOperatingLeaseLiabilities" name="IncreaseDecreaseInOperatingLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_ClassOfWarrantOrRightMaturityDate" name="ClassOfWarrantOrRightMaturityDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_OfficeLaboratoryAndManufacturingSpaceMember" name="OfficeLaboratoryAndManufacturingSpaceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ExpectedMinimumHoldingPercentageInOutstandingCommonStockAfterConversion" name="ExpectedMinimumHoldingPercentageInOutstandingCommonStockAfterConversion" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_PreFundedWarrantsMember" name="PreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PreferredStockConvertibleSharesOutstanding" name="PreferredStockConvertibleSharesOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_StockIssuedDuringPeriodSharesIssuanceOfCommonStockWarrantUponCashlessExercises" name="StockIssuedDuringPeriodSharesIssuanceOfCommonStockWarrantUponCashlessExercises" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_JuneThirtyTwoThousandTwentyFourMember" name="JuneThirtyTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_EquityStockIssuedDuringPeriodValuesNewIssues" name="EquityStockIssuedDuringPeriodValuesNewIssues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_WainwrightWarrantMember" name="WainwrightWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ProceedsFromAtTheMarketFacility" name="ProceedsFromAtTheMarketFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_CashlessExerciseOfCommonStockWarrants" name="CashlessExerciseOfCommonStockWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_WainwrightContingentWarrantMember" name="WainwrightContingentWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NewSalesAgreementMember" name="NewSalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ProductInstrumentsMember" name="ProductInstrumentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_LeaseExpirationMonthAndYear" name="LeaseExpirationMonthAndYear" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CollaborativeArrangementAdditionalFundingAmountToBeReceived" name="CollaborativeArrangementAdditionalFundingAmountToBeReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_PercentageOfAdditionalWarrants" name="PercentageOfAdditionalWarrants" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CommonStockWarrantsMember" name="CommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_LandlordMember" name="LandlordMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_IssuanceOfWarrants" name="IssuanceOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_OperatingLeasesEnteredIntoNovember2014Member" name="OperatingLeasesEnteredIntoNovember2014Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_T2DxInstrumentsAndComponentsMember" name="T2DxInstrumentsAndComponentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CancellationOfTermLoanInExchangeForCommonStockAndConvertiblePreferredStockToRelatedParty" name="CancellationOfTermLoanInExchangeForCommonStockAndConvertiblePreferredStockToRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_EquityStockIssuedDuringPeriodSharesNewIssues" name="EquityStockIssuedDuringPeriodSharesNewIssues" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_SupplementalBalanceSheetInformationTable" name="SupplementalBalanceSheetInformationTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_FederalDepositInsuranceCorporationMember" name="FederalDepositInsuranceCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_DebtInstrumentEventOfDefaultAdditionalInterestRate" name="DebtInstrumentEventOfDefaultAdditionalInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_DebtInstrumentUnaccruedPaidInKindInterest" name="DebtInstrumentUnaccruedPaidInKindInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_SalesAgreementMember" name="SalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SummaryOfContingentInterestPaymentsTableTextBlock" name="SummaryOfContingentInterestPaymentsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_SeriesBRedeemableConvertiblePreferredStockMember" name="SeriesBRedeemableConvertiblePreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_InterestExpenseToRelatedParty" name="InterestExpenseToRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ttoo_OperatingLeasesEnteredIntoSeptember2021Member" name="OperatingLeasesEnteredIntoSeptember2021Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_May2024CommonStockWarrantMember" name="May2024CommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SecurityDepositReceived" name="SecurityDepositReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ttoo_StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenAndInducementPlanMember" name="StockOptionPlansTwoThousandAndSixAndTwoThousandAndFourteenAndInducementPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_ContingentPaymentOfInterestPercentage" name="ContingentPaymentOfInterestPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_CustomerFMember" name="CustomerFMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NumberOfInstallmentsToPayRetentionBonus" name="NumberOfInstallmentsToPayRetentionBonus" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_MinimumLiquidityCovenantWaiverExpirationDate" name="MinimumLiquidityCovenantWaiverExpirationDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_UnauditedInterimFinancialInformationPolicyTextBlock" name="UnauditedInterimFinancialInformationPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_DebtInstrumentFinalPaymentFeePercentage" name="DebtInstrumentFinalPaymentFeePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_ExerciseOfWarrantsMember" name="ExerciseOfWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SeriesAAndSeriesBCommonStockWarrantsMember" name="SeriesAAndSeriesBCommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_DecemberThirtyOneTwoThousandTwentyFourMember" name="DecemberThirtyOneTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SeriesAWarrantMember" name="SeriesAWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_StockOptionPlan2006Member" name="StockOptionPlan2006Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_SupplementalBalanceSheetInformationLineItems" name="SupplementalBalanceSheetInformationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CommitmentsAndContingenciesLineItems" name="CommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_PercentageOfRoyaltyOnNetSales" name="PercentageOfRoyaltyOnNetSales" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_EntityAMember" name="EntityAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_LeasesTable" name="LeasesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_NumberOfCommonSharesIssuedUponConversionOfConvertiblePreferredStock" name="NumberOfCommonSharesIssuedUponConversionOfConvertiblePreferredStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_PercentageOfWorkforceReduction" name="PercentageOfWorkforceReduction" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ttoo_T2DxMember" name="T2DxMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ttoo_CollaborativeArrangementInitialValueOfConsideration" name="CollaborativeArrangementInitialValueOfConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
</xsd:schema>
