3.20.1 html 308 456 1 false 104 0 false 9 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - Consolidated Balance Sheets Sheet http://www.t2biosystems.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 100020 - Statement - Consolidated Balance Sheet (Parentheticals) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/StatementConsolidatedBalanceSheetParentheticals Consolidated Balance Sheet (Parentheticals) Statements 3 false false R4.htm 100030 - Statement - Consolidated Statements of Operations and Comprehensive Loss Sheet http://www.t2biosystems.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss Consolidated Statements of Operations and Comprehensive Loss Statements 4 false false R5.htm 100040 - Statement - Consolidated Statements of Stockholders' (Deficit) Equity Sheet http://www.t2biosystems.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfStockholdersDeficitEquity Consolidated Statements of Stockholders' (Deficit) Equity Statements 5 false false R6.htm 100050 - Statement - Consolidated Statements of Stockholders' (Deficit) Equity (Parentheticals) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/StatementConsolidatedStatementsOfStockholdersDeficitEquityParentheticals Consolidated Statements of Stockholders' (Deficit) Equity (Parentheticals) Statements 6 false false R7.htm 100060 - Statement - Consolidated Statement of Cash Flows Sheet http://www.t2biosystems.com/20191231/taxonomy/role/StatementConsolidatedStatementOfCashFlows Consolidated Statement of Cash Flows Statements 7 false false R8.htm 100070 - Disclosure - Nature of Business Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNatureOfBusiness Nature of Business Notes 8 false false R9.htm 100080 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 9 false false R10.htm 100090 - Disclosure - Fair Value Measurements Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureFairValueMeasurements Fair Value Measurements Notes 10 false false R11.htm 100100 - Disclosure - Restricted Cash Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureRestrictedCash Restricted Cash Notes 11 false false R12.htm 100110 - Disclosure - Supplemental Balance Sheet Information Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSupplementalBalanceSheetInformation Supplemental Balance Sheet Information Notes 12 false false R13.htm 100120 - Disclosure - Notes Payable Notes http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNotesPayable Notes Payable Notes 13 false false R14.htm 100130 - Disclosure - Stockholders' (Deficit) Equity Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockholdersDeficitEquity Stockholders' (Deficit) Equity Notes 14 false false R15.htm 100140 - Disclosure - Stock-Based Compensation Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensation Stock-Based Compensation Notes 15 false false R16.htm 100150 - Disclosure - Warrants Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureWarrants Warrants Notes 16 false false R17.htm 100160 - Disclosure - Net Loss Per Share Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNetLossPerShare Net Loss Per Share Notes 17 false false R18.htm 100170 - Disclosure - Income Taxes Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureIncomeTaxes Income Taxes Notes 18 false false R19.htm 100180 - Disclosure - Leases Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeases Leases Notes 19 false false R20.htm 100190 - Disclosure - Commitments and Contingencies Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 20 false false R21.htm 100200 - Disclosure - 401(k) Savings Plan Sheet http://www.t2biosystems.com/20191231/taxonomy/role/Disclosure401KSavingsPlan 401(k) Savings Plan Notes 21 false false R22.htm 100210 - Disclosure - Co-Development Agreements Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureCoDevelopmentAgreements Co-Development Agreements Notes 22 false false R23.htm 100220 - Disclosure - Quarterly Financial Data (unaudited) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialDataUnaudited Quarterly Financial Data (unaudited) Notes 23 false false R24.htm 100230 - Disclosure - Subsequent Events Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSubsequentEvents Subsequent Events Notes 24 false false R25.htm 100240 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies 25 false false R26.htm 100250 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies 26 false false R27.htm 100260 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureFairValueMeasurements 27 false false R28.htm 100270 - Disclosure - Supplemental Balance Sheet Information (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSupplementalBalanceSheetInformationTables Supplemental Balance Sheet Information (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSupplementalBalanceSheetInformation 28 false false R29.htm 100280 - Disclosure - Notes Payable (Tables) Notes http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNotesPayableTables Notes Payable (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNotesPayable 29 false false R30.htm 100290 - Disclosure - Stock-Based Compensation (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensationTables Stock-Based Compensation (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensation 30 false false R31.htm 100300 - Disclosure - Net Loss Per Share (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNetLossPerShareTables Net Loss Per Share (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNetLossPerShare 31 false false R32.htm 100310 - Disclosure - Income Taxes (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureIncomeTaxes 32 false false R33.htm 100320 - Disclosure - Leases (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeasesTables Leases (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeases 33 false false R34.htm 100330 - Disclosure - Quarterly Financial Data (unaudited) (Tables) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialDataUnauditedTables Quarterly Financial Data (unaudited) (Tables) Tables http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialDataUnaudited 34 false false R35.htm 100340 - Disclosure - Nature of Business - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail Nature of Business - Additional Information (Detail) Details 35 false false R36.htm 100350 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail Summary of Significant Accounting Policies - Additional Information (Detail) Details 36 false false R37.htm 100360 - Disclosure - Summary of Significant Accounting Policies - Components of Inventory (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesComponentsOfInventoryDetail Summary of Significant Accounting Policies - Components of Inventory (Detail) Details 37 false false R38.htm 100370 - Disclosure - Summary of Significant Accounting Policies - Disaggregation of Total Revenue by Major Resource (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesDisaggregationOfTotalRevenueByMajorResourceDetail Summary of Significant Accounting Policies - Disaggregation of Total Revenue by Major Resource (Detail) Details 38 false false R39.htm 100380 - Disclosure - Fair Value Measurements - Schedule of Financial Assets and Liabilities at Fair value on a Recurring Basis (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfFinancialAssetsAndLiabilitiesAtFairValueOnRecurringBasisDetail Fair Value Measurements - Schedule of Financial Assets and Liabilities at Fair value on a Recurring Basis (Detail) Details 39 false false R40.htm 100390 - Disclosure - Fair Value Measurements - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetail Fair Value Measurements - Additional Information (Detail) Details 40 false false R41.htm 100400 - Disclosure - Fair Value Measurements - Roll-Forward of Fair Value of Derivative Liability (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureFairValueMeasurementsRollForwardOfFairValueOfDerivativeLiabilityDetail Fair Value Measurements - Roll-Forward of Fair Value of Derivative Liability (Detail) Details 41 false false R42.htm 100410 - Disclosure - Restricted Cash - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureRestrictedCashAdditionalInformationDetail Restricted Cash - Additional Information (Detail) Details 42 false false R43.htm 100420 - Disclosure - Supplemental Balance Sheet Information - Schedule of Property and Equipment (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSupplementalBalanceSheetInformationScheduleOfPropertyAndEquipmentDetail Supplemental Balance Sheet Information - Schedule of Property and Equipment (Detail) Details 43 false false R44.htm 100430 - Disclosure - Supplemental Balance Sheet Information - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSupplementalBalanceSheetInformationAdditionalInformationDetail Supplemental Balance Sheet Information - Additional Information (Detail) Details 44 false false R45.htm 100440 - Disclosure - Supplemental Balance Sheet Information - Components of Accrued Expenses (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSupplementalBalanceSheetInformationComponentsOfAccruedExpensesDetail Supplemental Balance Sheet Information - Components of Accrued Expenses (Detail) Details 45 false false R46.htm 100450 - Disclosure - Notes Payable - Schedule of Debt (Detail) Notes http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNotesPayableScheduleOfDebtDetail Notes Payable - Schedule of Debt (Detail) Details 46 false false R47.htm 100460 - Disclosure - Notes Payable - Term Loan Agreement - Additional Information (Detail) Notes http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNotesPayableTermLoanAgreementAdditionalInformationDetail Notes Payable - Term Loan Agreement - Additional Information (Detail) Details 47 false false R48.htm 100470 - Disclosure - Notes Payable - Equipment Lease Credit Facility - Additional Information (Detail) Notes http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNotesPayableEquipmentLeaseCreditFacilityAdditionalInformationDetail Notes Payable - Equipment Lease Credit Facility - Additional Information (Detail) Details 48 false false R49.htm 100480 - Disclosure - Stockholders' (Deficit) Equity - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockholdersDeficitEquityAdditionalInformationDetail Stockholders' (Deficit) Equity - Additional Information (Detail) Details http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockholdersDeficitEquity 49 false false R50.htm 100490 - Disclosure - Stock-Based Compensation - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail Stock-Based Compensation - Additional Information (Detail) Details 50 false false R51.htm 100500 - Disclosure - Stock-Based Compensation - Summary of Stock Option Activity (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockOptionActivityDetail Stock-Based Compensation - Summary of Stock Option Activity (Detail) Details 51 false false R52.htm 100510 - Disclosure - Stock-Based Compensation - Schedule of Estimated Assumptions Used to Calculate Weighted-Average Grant Date Fair Value of Options Granted (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensationScheduleOfEstimatedAssumptionsUsedToCalculateWeightedAverageGrantDateFairValueOfOptionsGrantedDetail Stock-Based Compensation - Schedule of Estimated Assumptions Used to Calculate Weighted-Average Grant Date Fair Value of Options Granted (Detail) Details 52 false false R53.htm 100520 - Disclosure - Stock-Based Compensation - Schedule of Nonvested Restricted Stock Units Activity (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensationScheduleOfNonvestedRestrictedStockUnitsActivityDetail Stock-Based Compensation - Schedule of Nonvested Restricted Stock Units Activity (Detail) Details 53 false false R54.htm 100530 - Disclosure - Stock-Based Compensation - Schedule of Estimated Assumptions Used to Calculate Weighted-Average Fair Value of the Purchase Rights Granted (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensationScheduleOfEstimatedAssumptionsUsedToCalculateWeightedAverageFairValueOfPurchaseRightsGrantedDetail Stock-Based Compensation - Schedule of Estimated Assumptions Used to Calculate Weighted-Average Fair Value of the Purchase Rights Granted (Detail) Details 54 false false R55.htm 100540 - 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) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockBasedCompensationExpenseForStockOptionsGrantedThatWasRecordedInCompanySResultsOfOperationsDetail Stock-Based Compensation - Summary of Stock-Based Compensation Expense for Stock Options Granted that was Recorded in the Company's Results of Operations (Detail) Details 55 false false R56.htm 100550 - Disclosure - Warrants - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureWarrantsAdditionalInformationDetail Warrants - Additional Information (Detail) Details 56 false false R57.htm 100560 - Disclosure - Net Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share Applicable to Common Stockholders (Details) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNetLossPerShareScheduleOfBasicAndDilutedNetLossPerShareApplicableToCommonStockholdersDetails Net Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share Applicable to Common Stockholders (Details) Details 57 false false R58.htm 100570 - Disclosure - Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureNetLossPerShareScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareDetail Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) Details 58 false false R59.htm 100580 - Disclosure - Income Taxes - Schedule of Reconciliation of the U.S. Federal Statutory Rate to the Company's Effective Tax Rate (Details) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfUSFederalStatutoryRateToCompanySEffectiveTaxRateDetails Income Taxes - Schedule of Reconciliation of the U.S. Federal Statutory Rate to the Company's Effective Tax Rate (Details) Details 59 false false R60.htm 100590 - Disclosure - Income Taxes - Schedule Of Deferred Tax Assets (Details) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureIncomeTaxesScheduleOfDeferredTaxAssetsDetails Income Taxes - Schedule Of Deferred Tax Assets (Details) Details 60 false false R61.htm 100600 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 61 false false R62.htm 100610 - Disclosure - Leases - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeasesAdditionalInformationDetail Leases - Additional Information (Detail) Details 62 false false R63.htm 100620 - Disclosure - Leases - Schedule of Lease Cost (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeasesScheduleOfLeaseCostDetail Leases - Schedule of Lease Cost (Detail) Details 63 false false R64.htm 100630 - Disclosure - Leases - Schedule of Other Information Related to Leases (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeasesScheduleOfOtherInformationRelatedToLeasesDetail Leases - Schedule of Other Information Related to Leases (Detail) Details 64 false false R65.htm 100640 - Disclosure - Leases - Schedule of Maturity of Lease Liabilities (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeasesScheduleOfMaturityOfLeaseLiabilitiesDetail Leases - Schedule of Maturity of Lease Liabilities (Detail) Details 65 false false R66.htm 100660 - Disclosure - Leases - Summary of Lease Assets and Liabilities (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeasesSummaryOfLeaseAssetsAndLiabilitiesDetail Leases - Summary of Lease Assets and Liabilities (Detail) Details 66 false false R67.htm 100670 - Disclosure - Leases - Future Minimum Lease Payments (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureLeasesFutureMinimumLeasePaymentsDetail Leases - Future Minimum Lease Payments (Detail) Details 67 false false R68.htm 100680 - Disclosure - Commitments and Contingencies - Additional Information (Details) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetails Commitments and Contingencies - Additional Information (Details) Details 68 false false R69.htm 100690 - Disclosure - 401(k) Savings Plan - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/Disclosure401KSavingsPlanAdditionalInformationDetail 401(k) Savings Plan - Additional Information (Detail) Details 69 false false R70.htm 100700 - Disclosure - Co-Development Agreements - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureCoDevelopmentAgreementsAdditionalInformationDetail Co-Development Agreements - Additional Information (Detail) Details 70 false false R71.htm 100710 - Disclosure - Quarterly Financial Data (unaudited) (Details) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialDataUnauditedDetails Quarterly Financial Data (unaudited) (Details) Details http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureQuarterlyFinancialDataUnauditedTables 71 false false R72.htm 100720 - Disclosure - Subsequent Events - Additional Information (Detail) Sheet http://www.t2biosystems.com/20191231/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetail Subsequent Events - Additional Information (Detail) Details 72 false false All Reports Book All Reports ttoo-20191231.xml ttoo-20191231.xsd ttoo-20191231_cal.xml ttoo-20191231_def.xml ttoo-20191231_lab.xml ttoo-20191231_pre.xml http://fasb.org/us-gaap/2019-01-31 http://fasb.org/srt/2019-01-31 http://xbrl.sec.gov/dei/2019-01-31 true true