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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AcquisitionOfWorldwideRightsForTSHA120ForTreatmentOfGiantAxonalNeuropathyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">TSHA-120</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AcquisitionOfWorldwideRightsForTSHA120ForTreatmentOfGiantAxonalNeuropathyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acquisition Of Worldwide Rights For T S H A120 For Treatment Of Giant Axonal Neuropathy [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AcquisitionOfWorldwideRightsForTSHA120ForTreatmentOfGiantAxonalNeuropathyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Acquisition of worldwide rights for TSHA 120 for treatment of giant axonal neuropathy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Revenues from External Customers and Long-Lived Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total lease liabilities</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_FinanceLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</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</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">Preferred stock, shares issued</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">Preferred stock, shares issued</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/totalLabel">Preferred Stock, Shares Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationTaxCreditsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Credits:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationTaxCreditsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Tax Credit, Amount [Abstract]</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="tsha_SuccessFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Success Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Success fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Success fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases, Future Minimum Payments, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Excluding Current Maturities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term loan, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-term Debt, Excluding Current Maturities, Total</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="us-gaap_ResearchAndDevelopmentExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development program expense</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="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award options grants in period intrinsic value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options granted, Aggregate Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Warrant Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeTrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Three Trinity Term Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeTrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Three Trinity Term Loan Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeTrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023 Trinity Term Loan Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseForGanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License For GAN</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseForGanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License For GAN [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseForGanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Option to obtain license for GAN</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating expenses:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Less:</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</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_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="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award number of shares available for grant cancelled in period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantCancelledInPeriod_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 Cancelled In Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeitures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Tranche Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Payment Arrangement, Tranche Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockAndPreFundedWarrantsFromUnderwrittenPublicOfferingNetOfUnderwritingDiscountsAndSalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock and Pre-funded Warrants from Underwritten Public Offering, Net of Underwriting Discounts and Sales Commissions and Other Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockAndPreFundedWarrantsFromUnderwrittenPublicOfferingNetOfUnderwritingDiscountsAndSalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock and pre-funded warrants from underwritten public offering, net of underwriting discounts and sales commissions and other offering costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockAndPreFundedWarrantsFromUnderwrittenPublicOfferingNetOfUnderwritingDiscountsAndSalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock and pre-funded warrants from underwritten public offering, net of underwriting discounts and sales commissions and other offering costs</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="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="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Stated Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate202309Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2023-09</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate202309Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update 2023-09 [Member]</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="tsha_InducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Inducement Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inducement Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Inducement Plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Supplemental Cash Flow Information Related To Operating Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Supplemental Cash Flow Information Related To Operating Leases [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Schedule of Supplemental Cash Flow Information Related to Operating Leases</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</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unamortized Discount, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exit fee recorded as debt discount</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">Segments</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 Equivalent</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_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash and Cash Equivalents, at Carrying Value, Beginning Balance</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/periodEndLabel">Cash and Cash Equivalents, at Carrying Value, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Maturities of Long-Term Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Future Principal Debt Payments on Term Loan Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DeferredTaxAssetsImpairmentOfLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of long-lived assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DeferredTaxAssetsImpairmentOfLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets impairment of long-lived assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAndInventoryPurchaseAgreementSalesRelatedMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License and inventory purchase agreement sales related milestones payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAndInventoryPurchaseAgreementSalesRelatedMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License And Inventory Purchase Agreement Sales Related Milestones Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAndInventoryPurchaseAgreementSalesRelatedMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License and inventory purchase agreement sales related milestones payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Abeona Therapeutics Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Abeona Therapeutics Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Abeona</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Abstract]</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/totalLabel">Common Stock, Shares, Issued, Total</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/label">Common Stock, Shares, Issued</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="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfTermLoan_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in fair value of term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board of Directors Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrincipalAmountOfTermsRegardingFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of principal amount of terms regarding fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrincipalAmountOfTermsRegardingFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Principal Amount Of Terms Regarding Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrincipalAmountOfTermsRegardingFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of principal amount of terms regarding fee.</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_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted cash, noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_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_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use assets obtained in exchange for lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right-of-Use Asset Obtained in Exchange for Operating Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AssetsCapitalizedAsFinanceLeasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets capitalized as finance leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AssetsCapitalizedAsFinanceLeasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets Capitalized as Finance Leases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AssetsCapitalizedAsFinanceLeasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets Capitalized as Finance Leases</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">Share-based payment award, options, weighted-average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Emerging growth company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Emerging Growth Company Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EmergingGrowthCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Emerging Growth Company</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="tsha_UnderwritingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriting agreement member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwritingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Agreement Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwritingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options expired, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Build-to-suit lease liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Build To Suit Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Build-to-suit lease liability</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">SSI Warrants</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="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="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' equity</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="tsha_EquipmentPurchasesAndBuildOutOfLeasedFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equipment purchases and build-out of leased facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EquipmentPurchasesAndBuildOutOfLeasedFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equipment Purchases And Build Out Of Leased Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EquipmentPurchasesAndBuildOutOfLeasedFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equipment purchases and build-out of leased Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Three</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">Options exercisable at December 31, 2025, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCostAndReserveAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Type [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/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="us-gaap_SeveranceCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Severance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Severance and termination-related costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Severance paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation allowance increased (decreased)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAccruedSeveranceActivityRecordedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of accrued severance activity table text block.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAccruedSeveranceActivityRecordedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Accrued Severance Activity Recorded [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAccruedSeveranceActivityRecordedTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Accrued Severance Activity Recorded</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Rate Reconciliation Worldwide Changes In Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax rate reconciliation worldwide changes in unrecognized tax benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Worldwide changes in unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May Twenty Twenty Five Pre Funded Warrants Option One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May 2025 Pre Funded Warrants Option One.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 2025 Pre Funded Warrants Option One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PurchaseOfClinicalMaterialsAndReimbursementIncurredDevelopmentCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase of clinical materials and reimbursement incurred development costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PurchaseOfClinicalMaterialsAndReimbursementIncurredDevelopmentCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Of Clinical Materials And Reimbursement Incurred Development Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PurchaseOfClinicalMaterialsAndReimbursementIncurredDevelopmentCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of clinical materials and reimbursement incurred development costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash equivalents - money market funds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Valuation Allowance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Valuation allowance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Tax Assets, Valuation Allowance, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">US Federal Statutory Tax Rate</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">Purchase price per share of common stock</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/verboseLabel">Offering price per share of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardCommencementDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award commencement date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardCommencementDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Commencement Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardCommencementDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payment award, commencement date</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="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Third Party Engaged [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentsIncorporatedByReferenceTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Documents Incorporated by Reference [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentsIncorporatedByReferenceTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Documents Incorporated by Reference</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Noncash Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</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">Stock Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Jurisdiction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax Authority</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="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="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_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_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized tax benefits to change significantly over next 12 months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trinity Term Loan Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trinity Term Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trinity Term Loan Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtInstrumentFairValueAtBeginningOf2025SuccessFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt instrument, Fair Value at Beginning of 2025 Success Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtInstrumentFairValueAtBeginningOf2025SuccessFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument, fair Value at beginning of 2025 success fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtInstrumentFairValueAtBeginningOf2025SuccessFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beginning fair value balance of 2025 Success Fee on August 7, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Accounting Policies</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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Terms of Award</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAward_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payment award, terms of award issuance</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</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_VestingDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VestingDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</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">Options granted, Stock Options</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">Share-based payment award, 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">Options granted for purchase an aggregate share of common stock</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 Calculation of Basic and Diluted Net Loss Per Common Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ClosingDateThroughNovember132024Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Closing Date through November 13, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ClosingDateThroughNovember132024Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Closing Date through November 13, 2024 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ClosingDateThroughNovember132024Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Closing Date through November 13, 2024.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nondeductible items:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DecreasesResultingFromPriorPeriodTaxPositionsUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reduced uncertain tax positions related to prior year positions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DecreasesResultingFromPriorPeriodTaxPositionsUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Decreases Resulting From Prior Period Tax Positions Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DecreasesResultingFromPriorPeriodTaxPositionsUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Decreases resulting from prior period tax positions unrecognized tax benefits.</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/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/terseLabel">Net loss per common share, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Benefits [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OrganizationAndDescriptionOfBusinessOperationsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization and description of business operations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OrganizationAndDescriptionOfBusinessOperationsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization And Description Of Business Operations [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OrganizationAndDescriptionOfBusinessOperationsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization And Description Of Business Operations [Table]</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/verboseLabel">Outstanding performance and market-based options</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/periodStartLabel">Outstanding, Stock Options, Beginning Balance</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">Outstanding, Stock Options, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Issuance Costs</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="tsha_TwoThousandTwentyFiveTrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five Trinity Term Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyFiveTrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Five Trinity Term Loan Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyFiveTrinityTermLoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 Trinity Term Loan Agreement</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">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues from External Customers and Long-Lived Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SmallerReportingCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Smaller Reporting Company Policy [TextBlock]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SmallerReportingCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Smaller reporting company policy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SmallerReportingCompanyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Smaller Reporting Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InflationReductionActCorporateAlternativeMinimumTaxPercentageOnSomeLargeCorporations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inflation Reduction Act, Corporate Alternative Minimum Tax Percentage on Some Large Corporations</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InflationReductionActCorporateAlternativeMinimumTaxPercentageOnSomeLargeCorporations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Corporate alternative minimum tax on large corporations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShelfRegistrationTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shelf registration,term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShelfRegistrationTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shelf Registration Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShelfRegistrationTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shelf Registration,term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DomesticCountryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Domestic Tax Jurisdiction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DomesticCountryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Credits:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Tax Deferred Expense, Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</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">Debt issuance costs for term loan</link:label>
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          <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' equity</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="tsha_TSHA120ForTreatmentOfGiantAxonalNeuropathyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">T S H A 120 For Treatment Of Giant Axonal Neuropathy [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TSHA120ForTreatmentOfGiantAxonalNeuropathyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">TSHA-120 for treatment of giant axonal neuropathy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TSHA120ForTreatmentOfGiantAxonalNeuropathyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">TSHA-120</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitment fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Commitment Fee Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CommonStockAndWarrantsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock and warrants fair value disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CommonStockAndWarrantsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock and Warrants Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CommonStockAndWarrantsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock and warrants fair value disclosure.</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/2003/role/verboseLabel">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/totalLabel">Retained Earnings (Accumulated Deficit), Total</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/periodStartLabel">Retained Earnings (Accumulated Deficit), Beginning Balance</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/periodEndLabel">Retained Earnings (Accumulated Deficit), Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockAndPre-FundedWarrantsIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock and pre-funded warrants issued during period, value, new issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockAndPre-FundedWarrantsIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock and pre-funded warrants issued during period, value, new issues.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockAndPre-FundedWarrantsIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock and pre-funded warrants, upon closing of underwritten public offering, net of underwriting discounts and commissions, and other offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RemainingSalesAgentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining Sales Agents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RemainingSalesAgentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remaining Sales Agents [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RemainingSalesAgentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remaining Sales Agents.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Well-known Seasoned Issuer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Well-known Seasoned Issuer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperationsCommencedDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operations Commenced Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperationsCommencedDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease commencement date</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/verboseLabel">Options forfeited</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">Options cancelled or forfeited, Stock Options</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/terseLabel">Option award, canceled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeSuccessFeeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Three Success Fee Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeSuccessFeeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Three Success Fee Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeSuccessFeeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023 Success Fee Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaidClinicalTrial_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid clinical trial.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaidClinicalTrial_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Clinical Trial</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaidClinicalTrial_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid clinical trial</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offering price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Price Per Share</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, 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/label">Warrants and Rights Outstanding, Measurement Input</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_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="tsha_RemainingBalanceOfDebtDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining balance of debt discount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RemainingBalanceOfDebtDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remaining Balance of Debt Discount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RemainingBalanceOfDebtDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remaining balance of debt discount.</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="tsha_RisksAndUncertaintiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risks And Uncertainties Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RisksAndUncertaintiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risks and Uncertainties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RisksAndUncertaintiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Risks and uncertainties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityRefinanceDateThroughAugust2026Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trinity Refinance Date through August 2026 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityRefinanceDateThroughAugust2026Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trinity refinance date through August 2026.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityRefinanceDateThroughAugust2026Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trinity Refinance Date through August 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Line Items]</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="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_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">US Federal Statutory Tax Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount</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">Warrants issued</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">Class of Warrant or Right, Number of Securities Called by Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NumberOfAdditionalWarrantsIssuedUponExerciseOfUnderwritersOption_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Additional Warrants Issued Upon Exercise of Underwriters Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NumberOfAdditionalWarrantsIssuedUponExerciseOfUnderwritersOption_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of additional warrants issued upon exercise of underwriters option.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NumberOfAdditionalWarrantsIssuedUponExerciseOfUnderwritersOption_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional warrants sold upon exercise of underwriters option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ExitAndDisposalActivitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exit and disposal activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ExitAndDisposalActivitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exit And Disposal Activities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ExitAndDisposalActivitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exit and Disposal Activities</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' EQUITY</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="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchAndDevelopmentLicenseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Research and development license expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxPaymentsNetOfRefundsReceivedMaximumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Payments, Net Of Refunds Received Maximum Percentage</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxPaymentsNetOfRefundsReceivedMaximumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax payments, net of refunds received</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_WarrantsNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants note disclosure.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted-average exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</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">Accumulated depreciation</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="tsha_AugustTwoThousandAndTwentyThreePrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August 2023 Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustTwoThousandAndTwentyThreePrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">August Two Thousand And Twenty Three Private Placement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustTwoThousandAndTwentyThreePrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">August two thousand and twenty three private placement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EscrowDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Escrow Deposit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EscrowDeposit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount required to place in escrow account</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwrittenPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwritten public offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwrittenPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwritten Public Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwrittenPublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwritten Public Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrepaymentOfFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of prepayment of facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrepaymentOfFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Prepayment Of Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrepaymentOfFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of prepayment of facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_Performance-BasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance-Based Restricted Stock Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_Performance-BasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance-Based Restricted Stock Units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_Performance-BasedRestrictedStockUnitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance-Based Restricted Stock Units.</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_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]</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 Assumptions Used to Estimate Fair Value of Stock Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtIssuanceCostsIncurred_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt issuance costs incurred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtIssuanceCostsIncurred_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs Incurred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtIssuanceCostsIncurred_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt issuance costs incurred.</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_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="tsha_DebtIssuanceCostsExpensedUnderFairValueOption_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt issuance costs expensed under the fair value option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtIssuanceCostsExpensedUnderFairValueOption_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs Expensed under Fair Value Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtIssuanceCostsExpensedUnderFairValueOption_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt issuance costs expensed under fair value option.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]</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 disclosure of cash flow information:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May Twenty Twenty Five Pre Funded Warrants Option Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May 2025 Pre Funded Warrants Option Two.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 2025 Pre Funded Warrants Option Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DurhamLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Durham lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DurhamLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Durham Lease [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DurhamLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Durham Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityExpirationPeriod_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="us-gaap_LineOfCreditFacilityExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Expiration Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaymentOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayment of long term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaymentOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepayment of Long Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaymentOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepayment of long term debt.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ThroughMarchThirtyOneTwentyTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Through March Thirty One Twenty Twenty Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ThroughMarchThirtyOneTwentyTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Through March 31,2029.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ThroughMarchThirtyOneTwentyTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Through March 31,2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options replacement units grants in period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Replacement Units Grants In Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Replacement restricted units granted, Number of Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of shares awarded</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense Change in Fair Value of Warrant Liability and Note</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation, nondeductible expense change in fair value of warrant liability and note.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of Warrant Liability and note</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_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Undiscounted Excess Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of shares employees may purchase during offering period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total deferred tax assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CancelledOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cancelled options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CancelledOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cancelled Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CancelledOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancelled Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
          <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="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/verboseLabel">Document Type</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="tsha_ChangeInFairValueOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Fair Value of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of warrants.</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="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="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantNetOfReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Available for grant net of reserve - December 31, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantNetOfReserve_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 Net Of Reserve</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantNetOfReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award number of shares available for grant net of reserve.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeasePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Build-to-suit lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeasePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Build To Suit Lease Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeasePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Build-to-Suit Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeasePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Build-to-Suit Lease</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 increase (decrease) in cash, cash equivalents and restricted cash</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 Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</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_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Change in fair value of warrant liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of warrant liability</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/terseLabel">Warrant liability fair value adjustments</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 computation of diluted net loss per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetRelatedDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Balance Sheet Related Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairment loss on asset held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment of Long-Lived Assets to be Disposed of</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 per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Standards Update</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TaxCreditCarryforwardExpirationOrDueDateYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tax credit carryforward expiration or due date year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TaxCreditCarryforwardExpirationOrDueDateYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax Credit Carryforward Expiration Or Due Date Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TaxCreditCarryforwardExpirationOrDueDateYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax credit carryforward expiration or due date year</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="us-gaap_ProceedsFromIssuanceOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock upon exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Tranche One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Payment Arrangement, Tranche One</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_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">Outstanding, Weighted Average Remaining Contractual Life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-Funded Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pre Funded Warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Financial Statement Error Correction [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases, Future Minimum Payments, Due in Four Years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</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/terseLabel">Exercised, Stock Options</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">Exercised, Stock Options</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 upon exercise of stock options, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfCombinedVotingPowerBeneficiallyOwned_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Combined voting power beneficially owned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfCombinedVotingPowerBeneficiallyOwned_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Combined Voting Power Beneficially Owned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfCombinedVotingPowerBeneficiallyOwned_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of combined voting power beneficially owned.</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">Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]</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>
          <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="tsha_OrganizationAndDescriptionOfBusinessOperationsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Organization and description of business operations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OrganizationAndDescriptionOfBusinessOperationsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization And Description Of Business Operations [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OrganizationAndDescriptionOfBusinessOperationsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization and Description of Business Operations [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAggregateSharesBeneficiallyOwned_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Aggregate Shares Beneficially Owned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAggregateSharesBeneficiallyOwned_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of aggregate shares beneficially owned.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAggregateSharesBeneficiallyOwned_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares beneficially owned</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConstructionInProgressAndFinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Impairment Charge On Construction In Progress And Finance Lease Right Of Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConstructionInProgressAndFinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment charges to construction in process and finance lease right of use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConstructionInProgressAndFinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Impairment Charge On Construction In Progress And Finance Lease Right Of Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_QueensAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Queen's agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_QueensAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Queens Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_QueensAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Queens Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award number of shares available for grant granted in period..</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantedInPeriod_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 Granted In Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Grants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SalesAgentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales agent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SalesAgentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Agent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SalesAgentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Agents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax Disclosure [Table]</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/verboseLabel">Outstsanding performance and market-based RSU's</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/periodEndLabel">Nonvested, Number of Shares, Ending Balance</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">Nonvested, Number of Shares, Beginning Balance</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/terseLabel">Outstsanding performance and market-based RSU's and RSAs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases, Future Minimum Payments, Due Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreclinicalActivitiesPeriodUnderSponsoredResearchAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Preclinical activities period under sponsored research agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreclinicalActivitiesPeriodUnderSponsoredResearchAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preclinical Activities Period Under Sponsored Research Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreclinicalActivitiesPeriodUnderSponsoredResearchAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preclinical activities period under sponsored research agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TSHA120RettSyndromeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">T S H A120 Rett Syndrome [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TSHA120RettSyndromeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">T S H A120 Rett Syndrome.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TSHA120RettSyndromeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rett Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs, Gross</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/terseLabel">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/verboseLabel">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_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense, Policy [Policy Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Capital Shares Reserved for Future Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock reserved for future issuance</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="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Lender [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases, Future Minimum Payments, Due in Three Years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwritingDiscountsAndCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting discounts and commissions and other offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwritingDiscountsAndCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Discounts And Commissions and Other Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwritingDiscountsAndCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriting discounts and commissions and other offering costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State and local income taxes, net of federal benefit</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">Schedule of Total Stock-Based Compensation Expense for Stock Options, ESPP, RSAs and RSUs</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_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Stock Options Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock options were exercised during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of common stock upon exercise of stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Three Trinity Term Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Three Trinity Term Loans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023 Trinity Term Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomePolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Deferred Tax Assets and Liabilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Significant Components of Net Deferred Tax Asset</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">Astellas Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PerformanceSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Performance Stock Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PerformanceSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAssumptionsUsedToEstimateFairValueOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Assumptions Used To Estimate Fair Value Of Warrants [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAssumptionsUsedToEstimateFairValueOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of assumptions used to estimate fair value of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAssumptionsUsedToEstimateFairValueOfWarrantsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Assumptions Used to Estimate Fair Value of Warrants</link:label>
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          <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_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Revenue, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueCurrent_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="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Tax Credit Carryforwards, Research</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfSalePricePerShareOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of sale price per share of common stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfSalePricePerShareOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Sale Price Per Share Of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfSalePricePerShareOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of gross sales price per share of common stock</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/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 non-current assets</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/totalLabel">Other Assets, Noncurrent, Total</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 (in years)</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="tsha_November132025ThroughButExcludingTheMaturityDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 13, 2025 through, but excluding, the Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_November132025ThroughButExcludingTheMaturityDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">November 13, 2025 through, but excluding, the Maturity Date [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_November132025ThroughButExcludingTheMaturityDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">November 13, 2025 through, but excluding, the Maturity Date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SummaryOfTransactionPriceAllocationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary Of Transaction Price Allocation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SummaryOfTransactionPriceAllocationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Transaction Price Allocation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SummaryOfTransactionPriceAllocationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Allocation for Transaction Price to the Three Performance Obligations</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="tsha_ScheduleOfWarrantLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Warrant Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfWarrantLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Warrant Liability [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfWarrantLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of warrant liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Options expired, Stock Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OutstandingPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding payments due</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OutstandingPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Outstanding Payments Due</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OutstandingPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Outstanding payments due.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StateAndLocalJurisdictionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">State and Local Jurisdiction [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StateAndLocalJurisdictionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SaleRelatedMilestonesPerLicensedProductAndRoyaltiesOnNetSalesOfLicensedProductsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale-related milestones per licensed product and royalties on net sales of licensed products payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SaleRelatedMilestonesPerLicensedProductAndRoyaltiesOnNetSalesOfLicensedProductsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale Related Milestones Per Licensed Product And Royalties On Net Sales Of Licensed Products Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SaleRelatedMilestonesPerLicensedProductAndRoyaltiesOnNetSalesOfLicensedProductsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale-related milestones per licensed product and royalties on net sales of licensed products payable</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</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RegistrationPaymentArrangementArrangementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Registration Payment Arrangement, Arrangement [Domain]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of warrant liability.</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_LesseeOperatingLeaseOptionToExtend_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Option to Extend</link:label>
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          <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_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Preferred Stock, Value, Issued, Total</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/periodStartLabel">Preferred Stock, Value, Issued, Beginning Balance</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/periodEndLabel">Preferred Stock, Value, Issued, Ending Balance</link:label>
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          <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="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Minimum</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share-based payment award, RSU/RSA granted, weighted average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilSeptemberThirtyTwentyTwentyTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan from january one twenty twenty two until september thirty twenty twenty two.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilSeptemberThirtyTwentyTwentyTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan From January One Twenty Twenty Two Until September Thirty Twenty Twenty Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilSeptemberThirtyTwentyTwentyTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 1, 2022 until September 30, 2022</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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyStockIncentivePlanAndTwoThousandTwentyThreeInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Stock Incentive Plan and Two Thousand Twenty Three Inducement Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyStockIncentivePlanAndTwoThousandTwentyThreeInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty stock incentive plan and two thousand twenty three inducement plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyStockIncentivePlanAndTwoThousandTwentyThreeInducementPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Plan and Inducement Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Impairment loss on sale of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Sale of Assets and Asset Impairment Charges</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">Shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_November132024ThroughNovember132025Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 13, 2024 through November 13, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_November132024ThroughNovember132025Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">November 13, 2024 through November 13, 2025 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_November132024ThroughNovember132025Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">November 13, 2024 through November 13, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Abstract]</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 Measured at Fair Value on a Recurring Basis</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="tsha_TermLoanThroughAugustThirteenTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan through august thirteen twenty twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanThroughAugustThirteenTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan Through August Thirteen Twenty Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanThroughAugustThirteenTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Through August 13, 2023</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="tsha_EndOfTermPaymentPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">End of term payment percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EndOfTermPaymentPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">End of term payment percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EndOfTermPaymentPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">End of term payment percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OperatingLossCarryforwardAnnualLimitationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss carryforward annual utilization limitation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OperatingLossCarryforwardAnnualLimitationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carryforward Annual Limitation Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OperatingLossCarryforwardAnnualLimitationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating loss carryforward annual limitation amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PayrollAndPayrollRelatedCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payroll and payroll-related costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PayrollAndPayrollRelatedCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payroll And Payroll Related Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PayrollAndPayrollRelatedCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payroll and Payroll Related Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Unissued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross operating loss carryforward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carryforwards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Loss Carryforwards, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Renewal Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease extend term of contract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Stock Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from common stock issuances under ESPP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OfferingToAstellasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Offering to Astellas.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OfferingToAstellasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Offering to Astellas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OfferingToAstellasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offering to Astellas</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 - Note 13</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_LesseeLeasesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Leases [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_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_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-qualified stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Total</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/periodEndLabel">Nonvested, Weighted Average Grant Date Fair Value per Share, Ending Balance</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">Nonvested, Weighted Average Grant Date Fair Value per Share, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense [Member]</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/totalLabel">Total 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/terseLabel">Total lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorFirmId_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Firm ID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorFirmId_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Firm ID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Basis Spread on Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, basis spread on variable rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InterestRatePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InterestRatePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest rate period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InterestRatePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowOperatingActivitiesLesseeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow, Operating Activities, Lessee [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustThroughAugustMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">August Through August [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustThroughAugustMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">August Through August.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustThroughAugustMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August, 2026 through August, 2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConvertiblePreferredStockPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Convertible preferred stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConvertiblePreferredStockPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Preferred Stock Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConvertiblePreferredStockPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible Preferred Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromOctoberOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan from october one twenty twenty two until march thirty one twenty twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromOctoberOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan From October One Twenty Twenty Two Until March Thirty One Twenty Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromOctoberOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">October 1, 2022 until March 31, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash, current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrent_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_RestrictedCashCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfExitFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment of exit fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfExitFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment of Exit Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfExitFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment of exit fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease liabilities, current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Weighted Average Discount Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average discount rate - Finance leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in valuation allowance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfCalculatedDiscountedCashFlowsOfDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of calculated discounted cash flows of discount rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfCalculatedDiscountedCashFlowsOfDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Calculated Discounted Cash Flows Of Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfCalculatedDiscountedCashFlowsOfDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of calculated discounted cash flows of discount rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SignificantAccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Significant accounting policies line items.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SignificantAccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SignificantAccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Accounting Policies [Line Items]</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>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TransactionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transaction price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TransactionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transaction Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TransactionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TransactionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Transaction Price Allocation</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>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average common shares outstanding, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LaboratoryEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Laboratory equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LaboratoryEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Laboratory Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LaboratoryEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Laboratory Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award equity instruments other than options replacement units grants in period weighted average grant date fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Replacement Units Grants In Period Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Replacement restricted units granted, Weighted Average Grant Date Fair Value per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AdditionalMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional Milestone payments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AdditionalMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Milestone Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AdditionalMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 1, 2022 until March 31, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan From January One Twenty Twenty Two Until March Thirty One Twenty Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan from january one twenty twenty two until march thirty one twenty twenty three.</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">Options exercisable at December 31, 2025, Aggregate Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PropertyAndEquipmentInAccountsPayableAndAccruedExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Property and equipment in accounts payable and accrued expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PropertyAndEquipmentInAccountsPayableAndAccruedExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property And Equipment In Accounts Payable And Accrued Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PropertyAndEquipmentInAccountsPayableAndAccruedExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, plant and equipment in accounts payable and accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reconciliation of Federal Statutory Income Tax Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilitiesLeasingArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities, Leasing Arrangements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilitiesLeasingArrangements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right-of-use assets</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/label">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="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="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="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantPlanAdjustmentsAndAmendmentsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award number of shares available for grant plan adjustments and amendments in period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantPlanAdjustmentsAndAmendmentsInPeriod_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 Plan Adjustments And Amendments In Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantPlanAdjustmentsAndAmendmentsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan adjustments and amendments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate gross proceeds</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effective Income Tax Rate Reconciliation, Tax Credit, Percent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Tax Credit, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Corporate alternative minimum tax on large corporations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Debt outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Term Loan, net</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</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_DebtInstrumentInterestRateTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate terms description</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Asset, In-Process Research and Development</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in valuation allowance</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>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating lease landlord square feet manufacturing facility</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfRestructuringDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Type of Restructuring [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DallasLeaseAmendmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dallas lease amendment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DallasLeaseAmendmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dallas Lease Amendment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DallasLeaseAmendmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dallas Lease Amendment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConsultantsAndContractorsExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consultants and contractors expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConsultantsAndContractorsExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consultants and Contractors Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ConsultantsAndContractorsExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Consultants and contractors expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Five</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</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MinimumLicensedProductToDevelopObtainRegulatoryApprovalForAndCommercialize_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum licensed product to develop obtain regulatory approval for and commercialize.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MinimumLicensedProductToDevelopObtainRegulatoryApprovalForAndCommercialize_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Licensed Product To Develop Obtain Regulatory Approval For And Commercialize</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MinimumLicensedProductToDevelopObtainRegulatoryApprovalForAndCommercialize_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum licensed product to develop obtain regulatory approval for and commercialize</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address Address Line2</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_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="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">United States</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="tsha_TrinityTermLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trinity Term Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityTermLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trinity Term Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityTermLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trinity term loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Commissions and Other Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales commissions and other offering costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales commissions and other offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationDateOfIncorporation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, Date of Incorporation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationDateOfIncorporation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date of incorporation</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_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</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 disclosure of noncash investing and financing activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities and Other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities_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_AccruedLiabilitiesAndOtherLiabilities_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_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedLicenseFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued license fees current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedLicenseFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued License Fees Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedLicenseFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued license fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfFullyDilutedCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of fully diluted common stock shares outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfFullyDilutedCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Fully Diluted Common Stock Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfFullyDilutedCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of fully diluted common stock shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingOtherItemAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other segment expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingOtherItemAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Other Segment Item, Amount</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="tsha_CertainEmployeesAndConsultantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Certain employees and consultants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CertainEmployeesAndConsultantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Certain Employees And Consultants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CertainEmployeesAndConsultantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Certain Employees and Consultants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">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="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]</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 losses</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/verboseLabel">Impairment of long-lived assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementCommercialMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreement commercial milestones payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementCommercialMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement Commercial Milestones Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementCommercialMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License agreement commercial milestones payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Expertise of Management Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MaximumConstructionAllowanceProvidedByLandlordPerRentableSquareFoot_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum construction allowance provided by landlord per rentable square foot.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MaximumConstructionAllowanceProvidedByLandlordPerRentableSquareFoot_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Construction Allowance Provided By Landlord Per Rentable Square Foot</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MaximumConstructionAllowanceProvidedByLandlordPerRentableSquareFoot_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum construction allowance provided by landlord per rentable square foot</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredChargesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Charges, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredChargesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InitialOptionsAndOriginalOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial Options and Original Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InitialOptionsAndOriginalOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Initial Options and Original Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_InitialOptionsAndOriginalOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Initial options and original options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringPlanAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Axis]</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="tsha_TwentyTwentyThreePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2023 Pre-Funded Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwentyTwentyThreePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Twenty Three Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwentyTwentyThreePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty twenty three pre funded warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ValueOfVotingAndNon-VotingCommonStockHeldByNon-Affiliates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Value of voting and non-voting common stock held by non-affiliates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ValueOfVotingAndNon-VotingCommonStockHeldByNon-Affiliates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Value of Voting and Non-voting Common Stock Held by Non-Affiliates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ValueOfVotingAndNon-VotingCommonStockHeldByNon-Affiliates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Value of voting and non-voting common stock held by non-affiliates.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property Plant and Equipment, net</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="tsha_PaymentOfOneTimeUpfrontLicenseFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment of one-time upfront license fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfOneTimeUpfrontLicenseFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment Of One Time Upfront License Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfOneTimeUpfrontLicenseFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment of one-time upfront license fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityRefinanceDateUntilMarchThirtyOneTwentyTwentyEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trinity Refinance Date until March Thirty One Twenty Twenty Eight[Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityRefinanceDateUntilMarchThirtyOneTwentyTwentyEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trinity Refinance Date until March 31, 2028.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityRefinanceDateUntilMarchThirtyOneTwentyTwentyEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trinity Refinance Date Until March 31, 2028</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="us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total principal payments</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, 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/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/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="tsha_AssetsHeldForSalePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets Held for Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AssetsHeldForSalePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets Held for Sale [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AssetsHeldForSalePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets held for sale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_WarrantsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_WarrantsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_WarrantsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants policy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PerformanceAndMarketBasedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Performance and Market-based Restricted Stock Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PerformanceAndMarketBasedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance And Market-Based Stock Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PerformanceAndMarketBasedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance and market-based stock options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred offering costs</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_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance and market-based options vested</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_FinanceLeaseLiabilityPaymentsDueYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchAndExperimentationExpendituresAmortizedPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Research and experimentation expenditures amortized period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchAndExperimentationExpendituresAmortizedPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Experimentation Expenditures Amortized Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchAndExperimentationExpendituresAmortizedPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and experimentation expenditures amortized period</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_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="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentIncreaseAccruedInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Increase, Accrued Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upfront payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upfront Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upfront payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Goodwill and Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangibles</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 Activity</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</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="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_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exercise price of warrants Per Share</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_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_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_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/verboseLabel">Stock-based compensation expense</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="tsha_GiantAxonalNeuropathyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Option Agreement for GAN</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_GiantAxonalNeuropathyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Giant Axonal Neuropathy Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_GiantAxonalNeuropathyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Giant axonal neuropathy agreement.</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="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of Individual</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="dei_IcfrAuditorAttestationFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ICFR Auditor Attestation Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ICFR Auditor Attestation Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsAllocatedToSuccessFeeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds Allocated to Success Fee Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsAllocatedToSuccessFeeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds allocated to success fee liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsAllocatedToSuccessFeeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds allocated to Success Fee liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Property Plant Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Disposition of Property Plant Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on disposal of equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]</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_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</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/verboseLabel">Unvested RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_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_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="tsha_IssuanceOfCommonStockUponExerciseOfPre-FundedWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Common Stock Upon Exercise Of Pre-funded Warrants, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfPre-FundedWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock upon exercise of pre-funded warrants, shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfPre-FundedWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon exercise of pre-funded warrants, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RegulatoryRelatedMilestonesObligationPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory related milestones obligation payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RegulatoryRelatedMilestonesObligationPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Related Milestones Obligation Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RegulatoryRelatedMilestonesObligationPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory related milestones obligation payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VestingAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VestingAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive income (loss):</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Total deferred tax liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance Lease</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="tsha_ChangeInFairValueOfDebtInstrument_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Fair Value of Debt Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfDebtInstrument_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of debt instrument.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfDebtInstrument_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of warrant liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Fair Value of Warrant Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ChangeInFairValueOfWarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of warrant liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaRettAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Abeona Rett Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaRettAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Abeona Rett Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaRettAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Abeona Rett agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaRettAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Rett research and development activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award requisite service vesting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyStockIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty stock incentive plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyStockIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Stock Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyStockIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accruals and reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</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">Restricted cash, noncurrent</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">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/totalLabel">Restricted Cash, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unvested RSAs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CommonStockSharesIssuedAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock shares issued and sold.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CommonStockSharesIssuedAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued And Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_CommonStockSharesIssuedAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock shares issued and sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseForRettMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License For RETT</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseForRettMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License For RETT [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiInvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SSI Investors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiInvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SSI Investors [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiInvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SSI investors.</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 common 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/label">Weighted Average Number of Shares Outstanding, Diluted</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_AccountingStandardsUpdate202307Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2023-07</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate202307Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update 2023-07 [Member]</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_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="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitsValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock upon vesting and settlement of restricted stock units value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitsValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Common Stock Upon Vesting And Settlement Of Restricted Stock Units Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitsValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon vesting and settlement of restricted stock units, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reconcile of Change in Fair Value of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]</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_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total prepaid expenses and other current assets</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/terseLabel">Performance and market-based restricted stock units of other option forfeited during period</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">Cancelled or forfeited, Number of Shares</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 Financial Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax Disclosure [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_WarrantLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrant liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_WarrantLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_WarrantLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant liabilities, current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OptionToPurchaseAdditionalNumberOfCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Option To Purchase Additional Number Of Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OptionToPurchaseAdditionalNumberOfCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Option to purchase additional number of common shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OptionToPurchaseAdditionalNumberOfCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Option to purchase additional number of common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Domain]</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">Number of shares authorized for issuance</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 segment</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_SegmentReportingDisclosureTextBlock_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_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonvested Restricted Stock Shares Activity [Table Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Existing Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Previous Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty equity incentive plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyEquityIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Equity Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">May Twenty Twenty Five Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">May 2025 Pre Funded Warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MayTwentyTwentyFivePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 2025 Pre Funded Warrants</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>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfLicenseFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment of license fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfLicenseFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment Of License Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentOfLicenseFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License fee payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Non-cash loss on debt extinguishment</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trinity Term Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trinity Term Loans</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Aggregate Lease Commitments</link:label>
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          <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_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</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">Award vesting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeSeveranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Severance [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeSeveranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee Severance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_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="tsha_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="tsha_SalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of Common Stock Upon Exercise of Warrants, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock upon exercise of warrants, value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon exercise warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Total</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">Share-based payment award, unvested RSU/RSA granted, compensation cost not yet recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest and penalties associated with income tax positions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DecreaseInLiabilityDueToExerciseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Decrease in Liability Due to Exercise of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DecreaseInLiabilityDueToExerciseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Decrease in liability due to exercise of warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DecreaseInLiabilityDueToExerciseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Exercise of SSI Warrants</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">Operating lease term of contract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation award tranche four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Award Tranche Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationAwardTrancheFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Payment Arrangement, Tranche Four</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/periodEndLabel">Balance, shares</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">Balance, shares</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_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating lease liabilities, current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities, current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Flag]</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_DeferredTaxAssetsLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net deferred taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss carryforwards, limitations on use</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carryforwards, Limitations on Use</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_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Asset Impairment Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Impairment Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash impairment charge</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="tsha_AccruedSeveranceBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Accrued severance, Ending</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedSeveranceBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Accrued severance, Beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedSeveranceBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued severance balance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedSeveranceBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Severance Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockAndPre-FundedWarrantsIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock and Pre-funded Warrants Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockAndPre-FundedWarrantsIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock and pre-funded warrants issued during period, shares, new issues.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockAndPre-FundedWarrantsIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock and pre-funded warrants, upon closing of underwritten public offering, net of underwriting discounts and commissions, and other offering costs, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedClinicalTrialCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued clinical trial current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedClinicalTrialCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Clinical Trial Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedClinicalTrialCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued clinical trial</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="tsha_ScheduleOfAccruedExpenseAndOtherCurrentLabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of accrued expense and other current labilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAccruedExpenseAndOtherCurrentLabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Accrued Expense And Other Current Labilities Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfAccruedExpenseAndOtherCurrentLabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Accrued Expenses and Other Current Labilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OriginalOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Original Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OriginalOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Original Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OriginalOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Original Options.</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, net of sales commissions and other offering costs</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="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases, Future Minimum Payments Due, Next 12 Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_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_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent</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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Loss Per Common Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_Share-BasedCompensationArrangementByShare-BasedPaymentAwardOtherThanOptionsGrantDateFairValueNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement By Share-Based Payment Award, Other Than Options, Grant Date Fair Value Not Yet Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_Share-BasedCompensationArrangementByShare-BasedPaymentAwardOtherThanOptionsGrantDateFairValueNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based compensation arrangement by share-based payment award, other than options, grant date fair value not yet recognized.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_Share-BasedCompensationArrangementByShare-BasedPaymentAwardOtherThanOptionsGrantDateFairValueNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Grant date fair value of issued units not yet recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilitiesOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Liabilities, Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilitiesOther_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxLiabilitiesOther_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComputerEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Computer Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComputerEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Computer Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Text Block]</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_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/periodEndLabel">Outstanding, Aggregate Intrinsic Value, Ending Balance</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/periodStartLabel">Outstanding, Aggregate Intrinsic Value, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedSeverance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued Severance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedSeverance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Severance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedSeverance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued severance</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/verboseLabel">Warrants term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of supplemental information related to remaining lease term and discount rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Supplemental Information Related To Remaining Lease Term And Discount Rate [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Supplemental Information Related to Remaining Lease Term and Discount 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/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="us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from (Payment for) Other Financing Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAndInventoryPurchaseAgreementRegulatoryRelatedMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License and inventory purchase agreement regulatory related milestones payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAndInventoryPurchaseAgreementRegulatoryRelatedMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License And Inventory Purchase Agreement Regulatory Related Milestones Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAndInventoryPurchaseAgreementRegulatoryRelatedMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License and inventory purchase agreement regulatory related milestones payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating cash flows for operating leases</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_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, 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/terseLabel">Risk-free interest rate</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</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/verboseLabel">Prepaid expenses 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/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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Prepaid Expense and Other Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayment of 2023 Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of 2023 Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Activities [Abstract]</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="tsha_UnderwriterAgreedToPurchaseSharePriceOfPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriter Agreed To Purchase Share Price Of Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwriterAgreedToPurchaseSharePriceOfPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Underwriter agreed to purchase share price of per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UnderwriterAgreedToPurchaseSharePriceOfPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriter agreed to purchase share price of per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockPursuantToAtTheMarketOfferingNetOfSalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock Pursuant to At The Market Offering, Net of Sales Commissions and Other Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockPursuantToAtTheMarketOfferingNetOfSalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock pursuant to at the market offering, net of sales commissions and other offering costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockPursuantToAtTheMarketOfferingNetOfSalesCommissionsAndOtherOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock pursuant to at-the-market offering, net of sales commissions and other offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock upon vesting and settlement of restricted stock unit shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Common Stock Upon Vesting And Settlement Of Restricted Stock Unit Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon vesting and settlement of restricted stock units, net, shares</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">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [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="tsha_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities purchase agreement member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Benefits [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuiltToSuitLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Built-to-suit lease liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuiltToSuitLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Built To Suit Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuiltToSuitLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Build-to-suit lease liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_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_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Nonoperating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Nonoperating, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense related to term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Long-term Debt, Total</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 Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_At-The-MarketATMAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATM Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_At-The-MarketATMAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">At-The-Market (ATM) Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_At-The-MarketATMAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">At-The-Market (ATM) agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PublicOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Revenue, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenue_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="us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Prepaid Expenses and Other Current Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AstellasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Astellas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AstellasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Astellas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AstellasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Astellas</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost and Reserve [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_JuneTwentyTwentyFourPreFundedWarrantsOptionTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">June Twenty Twenty Four Pre Funded Warrants Option Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_JuneTwentyTwentyFourPreFundedWarrantsOptionTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">June twenty twenty four pre-funded warrants option two.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_JuneTwentyTwentyFourPreFundedWarrantsOptionTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">June 2024 Pre-Funded Warrants Option Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComponentsOfDeferredTaxAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Components of Deferred Tax Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisposals_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Disposals</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisposals_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equipment disposal book value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseDecreaseInAccruedExpenseAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase decrease in accrued expense and other liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseDecreaseInAccruedExpenseAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accrued Expense And Other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseDecreaseInAccruedExpenseAndOtherLiabilities_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_LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Term of contract, not yet commenced</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Stock Options Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from stock option exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Build-to-suit lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Build To Suit Lease [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BuildToSuitLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Build-to-Suit Lease</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="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="us-gaap_MeasurementInputSharePriceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Market value of common stock (per share)</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_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementForCLN7Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreement for CLN7.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementForCLN7Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement For C L N7 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementForCLN7Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License Agreement for CLN7</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_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_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Available to Common Stockholders, Basic, Total</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_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</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="tsha_DifferenceOfMarketValuePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Difference of market value paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DifferenceOfMarketValuePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Difference Of Market Value Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DifferenceOfMarketValuePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Difference of market value paid</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_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="tsha_PegasusParkLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pegasus Park, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PegasusParkLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pegasus Park L L C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PegasusParkLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pegasus Park L L C</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 Restricted Stock Units Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending fair value balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning fair value balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of loan at issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Revenues, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Revenue</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">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation</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_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="us-gaap_PrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Weighted Average Remaining Lease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average remaining lease term (in years) - Finance leases</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_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_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_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount</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">Options cancelled or forfeited, Weighted Average Exercise Price</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/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">Cancelled or forfeited, Weighted Average Grant Date Fair Value per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Money Market Funds</link:label>
          <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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock upon exercise of warrants, shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of Common Stock upon Exercise of Warrants, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon exercise warrants, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</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_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="tsha_SuccessFeeDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Success fee liability at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Success Fee Derivative liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Success Fee Derivative liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Success fee derivative liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Integration, Restructuring, and Other Related Costs [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Strategic Reprioritization</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 end date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other non-current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Liabilities, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringPlanDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</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">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</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/terseLabel">Changes in operating assets and liabilities:</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, Plant and Equipment Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Outstanding, Weighted Average Exercise Price, Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Outstanding, Weighted Average Exercise Price, Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RegulatoryMilestoneFeePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory milestone fee paid.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RegulatoryMilestoneFeePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Milestone Fee Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RegulatoryMilestoneFeePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory milestone fee paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Abstract]</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_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</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedPropertyPlantAndEquipmentCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedPropertyPlantAndEquipmentCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued property, plant, and equipment current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedPropertyPlantAndEquipmentCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Property Plant And Equipment Current</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_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Accounting Standards Update, Adoption Date</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="tsha_PresidentAndChiefExecutiveOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Former President and Chief Executive Officer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PresidentAndChiefExecutiveOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">President and chief executive officer.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PresidentAndChiefExecutiveOfficerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">President And Chief Executive Officer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAutomaticIncreaseEveryYearInCommonStockSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of automatic increase every year in common stock shares reserved for future issuance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAutomaticIncreaseEveryYearInCommonStockSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Automatic Increase Every Year In Common Stock Shares Reserved For Future Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAutomaticIncreaseEveryYearInCommonStockSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of automatic increase every year in common stock shares reserved for future issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementSalesRelatedMilestonesMaximumAmountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreement sales-related milestones maximum amount payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementSalesRelatedMilestonesMaximumAmountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement Sales Related Milestones Maximum Amount Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementSalesRelatedMilestonesMaximumAmountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License agreement sales-related milestones maximum amount payable</link:label>
          <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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ModifiedOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Modified Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ModifiedOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Modified Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ModifiedOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Modified Options.</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 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_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</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/terseLabel">Cash flows from financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitment fee percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Unused Capacity, Commitment Fee Percentage</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 term (in years)</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="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Ex Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Ex Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Future minimum remianing lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Success Fee Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Success Fee Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Success fee agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development tax credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Research and development tax credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EmployeeStockPurchasePlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee stock purchase plans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EmployeeStockPurchasePlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock Purchase Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EmployeeStockPurchasePlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee Stock Purchase Plan (ESPP)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Employee Subscription Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of common stock price purchased through payroll deductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchCollaborationAndLicenseAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Research, collaboration and license agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchCollaborationAndLicenseAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research Collaboration And License Agreements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NumberOfDistinctAndActiveClinicalStage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of distinct and active clinical stage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NumberOfDistinctAndActiveClinicalStage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Distinct And Active Clinical Stage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NumberOfDistinctAndActiveClinicalStage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of distinct and active clinical stage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">At the market offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">At The Market Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">At-the-Market Offering</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="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases, Future Minimum Payments, Due in Two Years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total other income, net</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="us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Stock Option Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RecentlyIssuedAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Recently issued accounting pronouncements policy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RecentlyIssuedAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recently Issued Accounting Pronouncements Policy Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_RecentlyIssuedAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recently Issued Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Aggregate Lease Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAnnualReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Annual Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentAnnualReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Annual Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustThroughButExcludingTheMaturityDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">August Through But Excluding The Maturity Date [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustThroughButExcludingTheMaturityDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">August Through But Excluding The Maturity Date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AugustThroughButExcludingTheMaturityDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August, 2027 through, but Excluding, the Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Employee Stock Purchase Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares of common stock issued under ESPP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of common stock under ESPP, shares</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">Share-based payment award, expiration period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ClinicalRegulatoryAndCommercialMilestonesToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Clinical, regulatory and commercial milestones to be received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ClinicalRegulatoryAndCommercialMilestonesToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Clinical Regulatory And Commercial Milestones To Be Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ClinicalRegulatoryAndCommercialMilestonesToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Clinical, regulatory and commercial milestones to be received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Comprehensive Income [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementRegulatoryMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreement regulatory milestones payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementRegulatoryMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement Regulatory Milestones Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementRegulatoryMilestonesPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License agreement regulatory milestones payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromAprilOneTwentyTwentyThreeUntilDecemberThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan from april one twenty twenty three until december thirty one twenty twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromAprilOneTwentyTwentyThreeUntilDecemberThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan From April One Twenty Twenty Three Until December Thirty One Twenty Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanFromAprilOneTwentyTwentyThreeUntilDecemberThirtyOneTwentyTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">April 1, 2023 until December 31, 2023</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</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MarketBasedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Market Based Stock Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MarketBasedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Market Based Stock Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_MarketBasedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Market based stock options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAnnualDefaultInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of annual default interest rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAnnualDefaultInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Annual Default Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfAnnualDefaultInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of annual default interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_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="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Fair Value Disclosure</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="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercised, 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/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="tsha_JuneTwentyTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">June Twenty Twenty Four Pre-funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_JuneTwentyTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">June twenty twenty four pre-funded warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_JuneTwentyTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 2024 Pre-funded Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Common Stock, Value, Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Value, Issued, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Value, Issued, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, $0.00001 par value per share; 700,000,000 shares authorized and 285,051,648 issued and outstanding as of December 31, 2025 and 400,000,000 shares authorized and 204,943,306 issued and outstanding as of December 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfShareBasedCompensationAvailableForGrantTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of share based compensation available for grant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfShareBasedCompensationAvailableForGrantTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Available For Grant [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ScheduleOfShareBasedCompensationAvailableForGrantTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Share Based Compensation Available for Grant under Incentive Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ExciseTaxRatePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Excise tax rate percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ExciseTaxRatePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Excise Tax Rate Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ExciseTaxRatePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Excise tax rate on corporate buy-backs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NonCashChangeInFairValueOfTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash change in fair value of term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NonCashChangeInFairValueOfTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non Cash Change In Fair Value Of Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_NonCashChangeInFairValueOfTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non cash change in fair value of term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principles of Consolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants associated with loan facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Outstanding liability classified warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Operating Loss Carryforwards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss carryforwards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Tax Assets, Operating Loss Carryforwards, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [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/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_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State and local income taxes, net of federal benefit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Success Fee Liability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Success fee liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SuccessFeeLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Success Fees Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchAndDevelopmentLicenseNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Research and development license not yet paid.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchAndDevelopmentLicenseNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research And Development License Not Yet Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ResearchAndDevelopmentLicenseNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of research and development license not yet paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AggregateOfferingPriceFromSaleOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate offering price from sale of common stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AggregateOfferingPriceFromSaleOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Offering Price From Sale Of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AggregateOfferingPriceFromSaleOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate offering price from sale of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityPublicFloat_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Public Float</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityPublicFloat_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Public Float</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Offering Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of payroll deductions of employee's compensation during offering period</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="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_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Convertible preferred stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyFiveTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five Trinity Term Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyFiveTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Five Trinity Term Loans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyFiveTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 Trinity Term Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LesseeOperatingAndFinanceLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lessee, operating and finance lease, liability, maturity .</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LesseeOperatingAndFinanceLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating And Finance Lease, Liability, Maturity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LesseeOperatingAndFinanceLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Future Minimum Commitments Under Company's Operating and Finance Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityLendersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trinity Lenders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityLendersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trinity Lenders [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TrinityLendersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trinity Lenders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lender Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DeferredTaxAssetsLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets lease liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DeferredTaxAssetsLeaseLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Lease Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DeferredTaxAssetsLeaseLiabilities_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="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="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loans</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_DebtInstrumentPeriodicPaymentPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Periodic Payment, Principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Voluntary Filers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Voluntary Filers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ReclassificationOfWarrantLiabilityClassifiedPreFundedWarrantsToEquityClassified_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Reclass of Pre-Funded Warrants to equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ReclassificationOfWarrantLiabilityClassifiedPreFundedWarrantsToEquityClassified_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Reclass of Pre-Funded Warrants to equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ReclassificationOfWarrantLiabilityClassifiedPreFundedWarrantsToEquityClassified_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant liability reclassified into equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ReclassificationOfWarrantLiabilityClassifiedPreFundedWarrantsToEquityClassified_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Of Warrant Liability Classified Pre-Funded Warrants To Equity Classified</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ReclassificationOfWarrantLiabilityClassifiedPreFundedWarrantsToEquityClassified_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of warrant liability classified pre-funded warrants to equity classified.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaymentOfTwoThousandTwentyThreeTrinityTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepayment Of Two Thousand Twenty Three Trinity Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaymentOfTwoThousandTwentyThreeTrinityTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepayment of two thousand twenty three trinity term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaymentOfTwoThousandTwentyThreeTrinityTermLoan_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepayment of 2023 Trinity term loan</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 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/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_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_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="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Additional Paid in Capital, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Additional Paid in Capital, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Additional Paid in Capital, Ending Balance</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="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ThirdPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Third Parties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ThirdPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Third parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ThirdPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Third Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedResearchAndDevelopmentCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued research and development current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedResearchAndDevelopmentCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Research And Development Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AccruedResearchAndDevelopmentCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_FairValueOfSharesTransferredValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of shares transferred value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_FairValueOfSharesTransferredValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Shares Transferred Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_FairValueOfSharesTransferredValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of shares transferred, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Assets held for sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset, Held-for-Sale, Not Part of Disposal Group, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Asset, Held-for-Sale, Not Part of Disposal Group, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Gross proceeds from issuance of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock from private placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net proceeds from issuance of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Rate Reconciliation, Nondeductible Expense Change In Fair Value Of Warrant Liability And Note</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax rate reconciliation, nondeductible expense change in fair value of warrant liability and note.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of Warrant Liability and note</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 Arrangement By Share Based Payment Award [Line Items]</link:label>
          <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="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentrations of Credit Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Compensation Related Costs, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock_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_DeferredRevenueRevenueRecognized1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueRevenueRecognized1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue, Revenue Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accumulated other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Other Comprehensive Income (Loss), Net of Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase of property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments to Acquire Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment for (Proceeds from) Other Investing Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForProceedsFromOtherInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other</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/terseLabel">Restricted units/stock granted, Number of Shares</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">Share-based payment award, RSU/RSA granted</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_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_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">Options exercisable at December 31, 2025, Weighted Average Remaining Contractual Life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BeneficialOwnershipLimitationNoticePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beneficial ownership limitation notice period (in days)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BeneficialOwnershipLimitationNoticePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beneficial Ownership Limitation Notice Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_BeneficialOwnershipLimitationNoticePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beneficial ownership limitation notice period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value of Financial Instruments, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value of Financial Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_GainLossOnFairValueOfTermsLoanAttributableToInstrumentSpecificCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss on Fair Value of Terms Loan Attributable to Instrument Specific Credit Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_GainLossOnFairValueOfTermsLoanAttributableToInstrumentSpecificCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain loss on fair value of terms loan attributable to instrument specific credit risk.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_GainLossOnFairValueOfTermsLoanAttributableToInstrumentSpecificCreditRisk_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value reported in comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_GainLossOnFairValueOfTermsLoanAttributableToInstrumentSpecificCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of term loan attributable to instrument specific credit risk</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, net of sales commissions and other offering costs, 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/verboseLabel">Number of shares issued</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">Number of shares issued or sell</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost [Abstract]</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/verboseLabel">Performance and market-based restricted stock units of other option vested during period</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">Vested, Number of Shares</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/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/terseLabel">Net loss per common share, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Segment Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Percent [Abstract]</link:label>
          <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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of Individual</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="tsha_JuneTwentyTwentyFourPreFundedWarrantsOptionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">June Twenty Twenty Four Pre-Funded Warrants Option One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_JuneTwentyTwentyFourPreFundedWarrantsOptionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">June twenty twenty four pre-funded warrants option one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_JuneTwentyTwentyFourPreFundedWarrantsOptionOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 2024 Pre-Funded Warrants Option One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payment award, expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Fee Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, fee amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance, lease liabilities, non-current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finance lease liabilities, non-current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EndOfTermPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">End of term payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EndOfTermPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">End Of Term Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EndOfTermPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">End of term payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Maximum borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Tax Credit Carryforwards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax credit carryforwards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Tax Assets, Tax Credit Carryforwards, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaCLN1AgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Abeona CLN1 agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaCLN1AgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Abeona C L N1 Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AbeonaCLN1AgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Abeona CLN1 Agreements</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_IncomeTaxReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development tax credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxReconciliationTaxCreditsResearch_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Research and development tax credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable lease cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Employee Stock Purchase Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock under ESPP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentsToAcquireLicenseRight_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments to acquire license right.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentsToAcquireLicenseRight_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire License Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PaymentsToAcquireLicenseRight_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash payment to acquire license agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Remaining Lease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average remaining lease term (in years) - Operating leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_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_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, 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/totalLabel">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/periodStartLabel">Property, Plant and Equipment, Net, Beginning Balance</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/periodEndLabel">Property, Plant and Equipment, Net, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreferredStockTrancheLiabilityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Preferred stock tranche liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreferredStockTrancheLiabilityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Tranche Liability Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PreferredStockTrancheLiabilityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock Tranche Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_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, Exercisable, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options exercisable at December 31, 2025</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 Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation</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 the end of the 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 the beginning of the 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">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total</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="tsha_ProceedsFromTwoThousandTwentyFiveTrinityTermLoanNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from 2025 Trinity term loan, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromTwoThousandTwentyFiveTrinityTermLoanNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Two Thousand Twenty Five Trinity Term Loan Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromTwoThousandTwentyFiveTrinityTermLoanNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from two thousand twenty five trinity term loan net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrepaymentPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of prepayment premium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrepaymentPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Prepayment Premium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfPrepaymentPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of prepayment premium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UTSouthwesternAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">UT southwestern agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UTSouthwesternAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">U T Southwestern Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_UTSouthwesternAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">UT Southwestern Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_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_CashAndCashEquivalentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents [Axis]</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</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="tsha_SsiWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SSI Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SSI Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SSI Warrants [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</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="tsha_StockIssuedDuringPeriodValueGainLossOnInstrumentSpecificCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Gain (Loss) On Instrument Specific Credit Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockIssuedDuringPeriodValueGainLossOnInstrumentSpecificCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period value gain (loss) on instrument specific credit risk.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_StockIssuedDuringPeriodValueGainLossOnInstrumentSpecificCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain (loss) on instrument-specific credit risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Weighted Average Discount Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average discount rate - Operating leases</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 liability, net of current portion</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/verboseLabel">Operating lease liabilities, non-current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1</link:label>
          <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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</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="tsha_PrepaidBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid bonus.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaidBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Bonus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaidBonus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid bonus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease, Cost [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCostTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Lease Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nondeductible items:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SeveranceCostRecorded_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Severance recorded</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SeveranceCostRecorded_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Severance Cost Recorded</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SeveranceCostRecorded_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Severance cost recorded.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Accounting Principle, Accounting Standards Update, Adopted [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLocation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other (expense) income:</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">Outside the United States</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeAndTwoThousandTwentyFiveTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Three And Two Thousand Twenty Five Trinity Term Loans Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeAndTwoThousandTwentyFiveTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty three and two thousand twenty five trinity term loans member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TwoThousandTwentyThreeAndTwoThousandTwentyFiveTrinityTermLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023 and 2025 Trinity Term Loans</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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Common Stock Equivalents Outstanding Excluded from Computation of Diluted Net Loss Per Share Attributable to Common Stockholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Jurisdiction [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxAuthorityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax Authority</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="tsha_OnSiteGenerationLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">On Site Generation Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OnSiteGenerationLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">On Site Generation Lease [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_OnSiteGenerationLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">On-site generation lease.</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="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_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_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [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="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 and Fixtures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SSI Warrant liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SSI Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_SsiWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SSI warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtInstrumentFairValueAtBeginningOf2025TrinityTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt instrument, Fair Value at Beginning of 2025 Trinity Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtInstrumentFairValueAtBeginningOf2025TrinityTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument, fair value at beginning of 2025 trinity term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DebtInstrumentFairValueAtBeginningOf2025TrinityTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beginning fair value balance of 2025 Trinity Term Loan on August 7, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents, at Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Current Borrowing Capacity</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_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">Preferred stock, issuing price per share</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">Share price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsUnvestedAndOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Unvested And Outstanding Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsUnvestedAndOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share based compensation arrangement by share based payment award other than options unvested and outstanding number.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsUnvestedAndOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested and Outstanding units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AmendedSalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amended Sales Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AmendedSalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amended Sales Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_AmendedSalesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amended Sales Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EffectiveIncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Worldwide changes in unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EffectiveIncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation Worldwide Changes In Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_EffectiveIncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Effective income tax rate reconciliation worldwide changes in unrecognized tax benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease liability current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Liability Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities, current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseOrDecreaseInBeneficialOwnershipLimitationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase or decrease in beneficial ownership limitation percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseOrDecreaseInBeneficialOwnershipLimitationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase or Decrease in Beneficial Ownership Limitation Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseOrDecreaseInBeneficialOwnershipLimitationPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase or decrease in beneficial ownership limitation percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization and Description of Business Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfRemeasuredCalculatedDiscountedCashFlowsOfDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of remeasured calculated discounted cash flows of discount rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfRemeasuredCalculatedDiscountedCashFlowsOfDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Remeasured Calculated Discounted Cash Flows Of Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PercentageOfRemeasuredCalculatedDiscountedCashFlowsOfDiscountRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of remeasured calculated discounted cash flows of discount rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction in Progress, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction in progress</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="tsha_TermLoanThroughDecemberThirtyOneTwentyTwentyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan through december thirty one twenty twenty one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanThroughDecemberThirtyOneTwentyTwentyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan Through December Thirty One Twenty Twenty One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_TermLoanThroughDecemberThirtyOneTwentyTwentyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Through December 31, 2021</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds from issuance of common stock</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_ProceedsFromIssuanceOfCommonStockNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock net.</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">Share-based payment award, options, compensation cost not yet recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Opinion [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Opinion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-lived assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DallasLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dallas lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DallasLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dallas Lease [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_DallasLeaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dallas Lease</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="tsha_LicenseAgreementRegulatoryRelatedMilestonesMaximumAmountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreement regulatory related milestones maximum amount payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementRegulatoryRelatedMilestonesMaximumAmountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement Regulatory Related Milestones Maximum Amount Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_LicenseAgreementRegulatoryRelatedMilestonesMaximumAmountPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License agreement regulatory related milestones maximum amount payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases, Future Minimum Payments Due</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Lease Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseDecreaseInGrossUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase (decrease) in gross unrecognized tax benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseDecreaseInGrossUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease in Gross Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_IncreaseDecreaseInGrossUnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in the amount of gross unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LaborAndRelatedExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Labor and Related Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LaborAndRelatedExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compensation expense</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/periodEndLabel">Available for grant - December 31, 2024</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/periodStartLabel">Available for grant - January 1, 2024</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">Share-based payment award, compensation cost not yet recognized, weighted-average period of recognition</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 and consulting fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaidResearchAndDevelopmentContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid research and development contracts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="tsha_PrepaidResearchAndDevelopmentContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Research And Development Contracts</link:label>
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          <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>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="tsha_AcquisitionOfWorldwideRightsForTSHA120ForTreatmentOfGiantAxonalNeuropathyMember" xlink:to="tsha_AcquisitionOfWorldwideRightsForTSHA120ForTreatmentOfGiantAxonalNeuropathyMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:to="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl"/>
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxReconciliationTaxCreditsAbstract" xlink:to="us-gaap_IncomeTaxReconciliationTaxCreditsAbstract_lbl"/>
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="tsha_SuccessFees" xlink:to="tsha_SuccessFees_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl"/>
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  <xsd:element id="tsha_LicenseAndInventoryPurchaseAgreementRegulatoryRelatedMilestonesPayment" name="LicenseAndInventoryPurchaseAgreementRegulatoryRelatedMilestonesPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_TermLoanFromAprilOneTwentyTwentyThreeUntilDecemberThirtyOneTwentyTwentyThreeMember" name="TermLoanFromAprilOneTwentyTwentyThreeUntilDecemberThirtyOneTwentyTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_DeferredTaxAssetsImpairmentOfLongLivedAssets" name="DeferredTaxAssetsImpairmentOfLongLivedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_InterestRatePeriod" name="InterestRatePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_PublicOfferingMember" name="PublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_AbeonaTherapeuticsIncMember" name="AbeonaTherapeuticsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_GainLossOnFairValueOfTermsLoanAttributableToInstrumentSpecificCreditRisk" name="GainLossOnFairValueOfTermsLoanAttributableToInstrumentSpecificCreditRisk" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_CancelledOptionsMember" name="CancelledOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilSeptemberThirtyTwentyTwentyTwoMember" name="TermLoanFromJanuaryOneTwentyTwentyTwoUntilSeptemberThirtyTwentyTwentyTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_AugustThroughButExcludingTheMaturityDateMember" name="AugustThroughButExcludingTheMaturityDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ConsultantsAndContractorsExpense" name="ConsultantsAndContractorsExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_JuneTwentyTwentyFourPreFundedWarrantsMember" name="JuneTwentyTwentyFourPreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_SignificantAccountingPoliciesTable" name="SignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TSHA120RettSyndromeMember" name="TSHA120RettSyndromeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TwoThousandTwentyThreeAndTwoThousandTwentyFiveTrinityTermLoansMember" name="TwoThousandTwentyThreeAndTwoThousandTwentyFiveTrinityTermLoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ChangeInFairValueOfTermLoan" name="ChangeInFairValueOfTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_ChangeInFairValueOfWarrants" name="ChangeInFairValueOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_LicenseForGanMember" name="LicenseForGanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_PercentageOfFullyDilutedCommonStockSharesOutstanding" name="PercentageOfFullyDilutedCommonStockSharesOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ProceedsFromIssuanceOfCommonStockNet" name="ProceedsFromIssuanceOfCommonStockNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_DurhamLeaseMember" name="DurhamLeaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_MayTwentyTwentyFivePreFundedWarrantsMember" name="MayTwentyTwentyFivePreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_JuneTwentyTwentyFourPreFundedWarrantsOptionTwoMember" name="JuneTwentyTwentyFourPreFundedWarrantsOptionTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_EffectiveIncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits" name="EffectiveIncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantedInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantGrantedInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_SuccessFeeDerivativeLiability" name="SuccessFeeDerivativeLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_InitialOptionsAndOriginalOptionsMember" name="InitialOptionsAndOriginalOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_AcquisitionOfWorldwideRightsForTSHA120ForTreatmentOfGiantAxonalNeuropathyMember" name="AcquisitionOfWorldwideRightsForTSHA120ForTreatmentOfGiantAxonalNeuropathyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_InducementPlanMember" name="InducementPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_PerformanceAndMarketBasedStockOptionsMember" name="PerformanceAndMarketBasedStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_WarrantsNoteDisclosureTextBlock" name="WarrantsNoteDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitsValue" name="IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitsValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_TrinityRefinanceDateThroughAugust2026Member" name="TrinityRefinanceDateThroughAugust2026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ShelfRegistrationTerm" name="ShelfRegistrationTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_NumberOfDistinctAndActiveClinicalStage" name="NumberOfDistinctAndActiveClinicalStage" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_EndOfTermPaymentPercentage" name="EndOfTermPaymentPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ResearchCollaborationAndLicenseAgreementsAbstract" name="ResearchCollaborationAndLicenseAgreementsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_RegulatoryMilestoneFeePaid" name="RegulatoryMilestoneFeePaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_At-The-MarketATMAgreementMember" name="At-The-MarketATMAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_SuccessFeeAgreementMember" name="SuccessFeeAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_SsiWarrants" name="SsiWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_AtTheMarketOfferingMember" name="AtTheMarketOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_IncreaseDecreaseInAccruedExpenseAndOtherLiabilities" name="IncreaseDecreaseInAccruedExpenseAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_AstellasMember" name="AstellasMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_DeferredTaxAssetsLeaseLiabilities" name="DeferredTaxAssetsLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_BuildToSuitLeasePolicyTextBlock" name="BuildToSuitLeasePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_AccruedSeverance" name="AccruedSeverance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_CommonStockAndWarrantsFairValueDisclosure" name="CommonStockAndWarrantsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_ProceedsFromIssuanceOfCommonStockAndPreFundedWarrantsFromUnderwrittenPublicOfferingNetOfUnderwritingDiscountsAndSalesCommissionsAndOtherOfferingCosts" name="ProceedsFromIssuanceOfCommonStockAndPreFundedWarrantsFromUnderwrittenPublicOfferingNetOfUnderwritingDiscountsAndSalesCommissionsAndOtherOfferingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_ProbabilityOfAnOptionExercise" name="ProbabilityOfAnOptionExercise" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_TwoThousandTwentyThreeSuccessFeeAgreementMember" name="TwoThousandTwentyThreeSuccessFeeAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_AggregateOfferingPriceFromSaleOfCommonStock" name="AggregateOfferingPriceFromSaleOfCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_IncreaseOrDecreaseInBeneficialOwnershipLimitationPercentage" name="IncreaseOrDecreaseInBeneficialOwnershipLimitationPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_SalesAgentMember" name="SalesAgentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_IssuanceOfWarrantLiability" name="IssuanceOfWarrantLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_IncomeTaxDisclosureLineItems" name="IncomeTaxDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ClosingDateThroughNovember132024Member" name="ClosingDateThroughNovember132024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ScheduleOfAccruedSeveranceActivityRecordedTableTextBlock" name="ScheduleOfAccruedSeveranceActivityRecordedTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriodWeightedAverageGrantDateFairValue" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_TSHA120ForTreatmentOfGiantAxonalNeuropathyMember" name="TSHA120ForTreatmentOfGiantAxonalNeuropathyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_LicenseAgreementCommercialMilestonesPayment" name="LicenseAgreementCommercialMilestonesPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_AccruedLicenseFeesCurrent" name="AccruedLicenseFeesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_IncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits" name="IncomeTaxRateReconciliationWorldwideChangesInUnrecognizedTaxBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_ConstructionInProgressAndFinanceLeaseRightOfUseAsset" name="ConstructionInProgressAndFinanceLeaseRightOfUseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_ModifiedOptionsMember" name="ModifiedOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TwoThousandTwentyStockIncentivePlanMember" name="TwoThousandTwentyStockIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ProceedsFromIssuanceOfCommonStockPursuantToAtTheMarketOfferingNetOfSalesCommissionsAndOtherOfferingCosts" name="ProceedsFromIssuanceOfCommonStockPursuantToAtTheMarketOfferingNetOfSalesCommissionsAndOtherOfferingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_TwoThousandTwentyThreeTrinityTermLoansMember" name="TwoThousandTwentyThreeTrinityTermLoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_November132025ThroughButExcludingTheMaturityDateMember" name="November132025ThroughButExcludingTheMaturityDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TermLoanFacilityMember" name="TermLoanFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_AssetsHeldForSalePolicyTextBlock" name="AssetsHeldForSalePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_StockIssuedDuringPeriodValueGainLossOnInstrumentSpecificCreditRisk" name="StockIssuedDuringPeriodValueGainLossOnInstrumentSpecificCreditRisk" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_WarrantLiabilityCurrent" name="WarrantLiabilityCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_ExciseTaxRatePercentage" name="ExciseTaxRatePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_LesseeOperatingAndFinanceLeaseLiabilityMaturityTableTextBlock" name="LesseeOperatingAndFinanceLeaseLiabilityMaturityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_OnSiteGenerationLeaseMember" name="OnSiteGenerationLeaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_IssuanceOfCommonStockUponExerciseOfPre-FundedWarrantsShares" name="IssuanceOfCommonStockUponExerciseOfPre-FundedWarrantsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_AmendedSalesAgreementMember" name="AmendedSalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TrinityTermLoans" name="TrinityTermLoans" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_LaboratoryEquipmentMember" name="LaboratoryEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_UnderwritingAgreementMember" name="UnderwritingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_BeneficialOwnershipLimitationNoticePeriod" name="BeneficialOwnershipLimitationNoticePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ProgramExpense" name="ProgramExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_DecreasesResultingFromPriorPeriodTaxPositionsUnrecognizedTaxBenefits" name="DecreasesResultingFromPriorPeriodTaxPositionsUnrecognizedTaxBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitShares" name="IssuanceOfCommonStockUponVestingAndSettlementOfRestrictedStockUnitShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_FairValueOfSharesTransferredValue" name="FairValueOfSharesTransferredValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_PaymentsToAcquireLicenseRight" name="PaymentsToAcquireLicenseRight" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantCancelledInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantCancelledInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ThroughMarchThirtyOneTwentyTwentyNineMember" name="ThroughMarchThirtyOneTwentyTwentyNineMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_DebtInstrumentFairValueAtBeginningOf2025SuccessFee" name="DebtInstrumentFairValueAtBeginningOf2025SuccessFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_OrganizationAndDescriptionOfBusinessOperationsLineItems" name="OrganizationAndDescriptionOfBusinessOperationsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_AssetsCapitalizedAsFinanceLeasesMember" name="AssetsCapitalizedAsFinanceLeasesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_UnderwrittenPublicOfferingMember" name="UnderwrittenPublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_SaleRelatedMilestonesPerLicensedProductAndRoyaltiesOnNetSalesOfLicensedProductsPayable" name="SaleRelatedMilestonesPerLicensedProductAndRoyaltiesOnNetSalesOfLicensedProductsPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_IncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote" name="IncomeTaxRateReconciliationNondeductibleExpenseChangeInFairValueOfWarrantLiabilityAndNote" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_InterestRateExtensionPeriod" name="InterestRateExtensionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_PercentageOfAutomaticIncreaseEveryYearInCommonStockSharesReservedForFutureIssuance" name="PercentageOfAutomaticIncreaseEveryYearInCommonStockSharesReservedForFutureIssuance" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_MinimumLicensedProductToDevelopObtainRegulatoryApprovalForAndCommercialize" name="MinimumLicensedProductToDevelopObtainRegulatoryApprovalForAndCommercialize" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ScheduleOfWarrantLiabilityTableTextBlock" name="ScheduleOfWarrantLiabilityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsValue" name="IssuanceOfCommonStockUponExerciseOfWarrantsValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_LicenseAgreementSalesRelatedMilestonesMaximumAmountPayable" name="LicenseAgreementSalesRelatedMilestonesMaximumAmountPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_AccruedSeveranceBalance" name="AccruedSeveranceBalance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_Share-BasedCompensationArrangementByShare-BasedPaymentAwardOtherThanOptionsGrantDateFairValueNotYetRecognized" name="Share-BasedCompensationArrangementByShare-BasedPaymentAwardOtherThanOptionsGrantDateFairValueNotYetRecognized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_SsiWarrantsMember" name="SsiWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_WarrantLiabilityFairValueDisclosure" name="WarrantLiabilityFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_SummaryOfTransactionPriceAllocationTableTextBlock" name="SummaryOfTransactionPriceAllocationTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_UnderwriterAgreedToPurchaseSharePriceOfPerShare" name="UnderwriterAgreedToPurchaseSharePriceOfPerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="tsha_AbeonaRettAgreementMember" name="AbeonaRettAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_PrepaidClinicalTrial" name="PrepaidClinicalTrial" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionTwoMember" name="MayTwentyTwentyFivePreFundedWarrantsOptionTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_PreferredStockTrancheLiabilityPolicyTextBlock" name="PreferredStockTrancheLiabilityPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_NonCashChangeInFairValueOfTermLoan" name="NonCashChangeInFairValueOfTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_SalesAgreementMember" name="SalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TermLoanThroughAugustThirteenTwentyTwentyThreeMember" name="TermLoanThroughAugustThirteenTwentyTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_OriginalOptionsMember" name="OriginalOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReplacementUnitsGrantsInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ProceedsAllocatedToSuccessFeeLiability" name="ProceedsAllocatedToSuccessFeeLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_EndOfTermPayment" name="EndOfTermPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_BuiltToSuitLeaseLiability" name="BuiltToSuitLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_TrinityLendersMember" name="TrinityLendersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_TermLoanThroughDecemberThirtyOneTwentyTwentyOneMember" name="TermLoanThroughDecemberThirtyOneTwentyTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_PreFundedWarrantsMember" name="PreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_EquipmentPurchasesAndBuildOutOfLeasedFacility" name="EquipmentPurchasesAndBuildOutOfLeasedFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_DebtIssuanceCostsIncurred" name="DebtIssuanceCostsIncurred" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_UTSouthwesternAgreementMember" name="UTSouthwesternAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_InflationReductionActCorporateAlternativeMinimumTaxPercentageOnSomeLargeCorporations" name="InflationReductionActCorporateAlternativeMinimumTaxPercentageOnSomeLargeCorporations" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_EmployeeStockPurchasePlansMember" name="EmployeeStockPurchasePlansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ResearchAndDevelopmentLicenseNotYetPaid" name="ResearchAndDevelopmentLicenseNotYetPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_TermLoanFromOctoberOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember" name="TermLoanFromOctoberOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_PercentageOfPrepaymentPremium" name="PercentageOfPrepaymentPremium" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_PrepaymentOfLongTermDebt" name="PrepaymentOfLongTermDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_SeveranceCostRecorded" name="SeveranceCostRecorded" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_PercentageOfPrincipalAmountOfTermsRegardingFee" name="PercentageOfPrincipalAmountOfTermsRegardingFee" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_PercentageOfPrepaymentOfFacility" name="PercentageOfPrepaymentOfFacility" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_DebtIssuanceCostsExpensedUnderFairValueOption" name="DebtIssuanceCostsExpensedUnderFairValueOption" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_Performance-BasedRestrictedStockUnitsMember" name="Performance-BasedRestrictedStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_DifferenceOfMarketValuePaid" name="DifferenceOfMarketValuePaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_PurchaseOfClinicalMaterialsAndReimbursementIncurredDevelopmentCosts" name="PurchaseOfClinicalMaterialsAndReimbursementIncurredDevelopmentCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_RemainingSalesAgentsMember" name="RemainingSalesAgentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ConvertiblePreferredStockPolicyTextBlock" name="ConvertiblePreferredStockPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ThirdPartiesMember" name="ThirdPartiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_TwoThousandTwentyFiveTrinityTermLoanAgreementMember" name="TwoThousandTwentyFiveTrinityTermLoanAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_AdditionalMilestonePayments" name="AdditionalMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_TwoThousandTwentyThreeTrinityTermLoanAgreementMember" name="TwoThousandTwentyThreeTrinityTermLoanAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_RemainingBalanceOfDebtDiscount" name="RemainingBalanceOfDebtDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_ClinicalRegulatoryAndCommercialMilestonesToBeReceived" name="ClinicalRegulatoryAndCommercialMilestonesToBeReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_GiantAxonalNeuropathyAgreementMember" name="GiantAxonalNeuropathyAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_LicenseAgreementRegulatoryRelatedMilestonesMaximumAmountPayable" name="LicenseAgreementRegulatoryRelatedMilestonesMaximumAmountPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_MarketBasedStockOptionsMember" name="MarketBasedStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_LicenseForRettMember" name="LicenseForRettMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ShareBasedCompensationAwardTrancheFourMember" name="ShareBasedCompensationAwardTrancheFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantPlanAdjustmentsAndAmendmentsInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantPlanAdjustmentsAndAmendmentsInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_TwoThousandTwentyEquityIncentivePlanMember" name="TwoThousandTwentyEquityIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_StockAndPre-FundedWarrantsIssuedDuringPeriodSharesNewIssues" name="StockAndPre-FundedWarrantsIssuedDuringPeriodSharesNewIssues" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_PaymentOfExitFee" name="PaymentOfExitFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_PercentageOfSalePricePerShareOfCommonStock" name="PercentageOfSalePricePerShareOfCommonStock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ProceedsFromTermLoan" name="ProceedsFromTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_PreclinicalActivitiesPeriodUnderSponsoredResearchAgreements" name="PreclinicalActivitiesPeriodUnderSponsoredResearchAgreements" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_November132024ThroughNovember132025Member" name="November132024ThroughNovember132025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_LicenseAndInventoryPurchaseAgreementSalesRelatedMilestonesPayment" name="LicenseAndInventoryPurchaseAgreementSalesRelatedMilestonesPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_IncomeTaxPaymentsNetOfRefundsReceivedMaximumPercentage" name="IncomeTaxPaymentsNetOfRefundsReceivedMaximumPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_IssuanceOfCommonStockUponExerciseOfWarrantsShares" name="IssuanceOfCommonStockUponExerciseOfWarrantsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_PercentageOfAnnualDefaultInterestRate" name="PercentageOfAnnualDefaultInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantNetOfReserve" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantNetOfReserve" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="tsha_AccruedClinicalTrialCurrent" name="AccruedClinicalTrialCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_SuccessFeeLiabilityMember" name="SuccessFeeLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_PrepaidResearchAndDevelopmentContracts" name="PrepaidResearchAndDevelopmentContracts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_ScheduleOfAssumptionsUsedToEstimateFairValueOfWarrantsTableTextBlock" name="ScheduleOfAssumptionsUsedToEstimateFairValueOfWarrantsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_RisksAndUncertaintiesPolicyTextBlock" name="RisksAndUncertaintiesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_PrepaymentOfTwoThousandTwentyThreeTrinityTermLoan" name="PrepaymentOfTwoThousandTwentyThreeTrinityTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_BuildToSuitLeaseMember" name="BuildToSuitLeaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_MaximumConstructionAllowanceProvidedByLandlordPerRentableSquareFoot" name="MaximumConstructionAllowanceProvidedByLandlordPerRentableSquareFoot" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_OptionToPurchaseAdditionalNumberOfCommonShares" name="OptionToPurchaseAdditionalNumberOfCommonShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="tsha_DallasLeaseAmendmentMember" name="DallasLeaseAmendmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_QueensAgreementMember" name="QueensAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_RegulatoryRelatedMilestonesObligationPayable" name="RegulatoryRelatedMilestonesObligationPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_TermLoanFromJanuaryOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember" name="TermLoanFromJanuaryOneTwentyTwentyTwoUntilMarchThirtyOneTwentyTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ProceedsFromTwoThousandTwentyFiveTrinityTermLoanNet" name="ProceedsFromTwoThousandTwentyFiveTrinityTermLoanNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_MayTwentyTwentyFivePreFundedWarrantsOptionOneMember" name="MayTwentyTwentyFivePreFundedWarrantsOptionOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="tsha_ResearchAndDevelopmentLicenseExpense" name="ResearchAndDevelopmentLicenseExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="tsha_SuccessFees" name="SuccessFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_TransactionPrice" name="TransactionPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="tsha_PercentageOfCombinedVotingPowerBeneficiallyOwned" name="PercentageOfCombinedVotingPowerBeneficiallyOwned" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="tsha_IncomeTaxDisclosureTable" name="IncomeTaxDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
</xsd:schema>
