3.22.4 html 262 545 1 false 109 0 false 10 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - Consolidated Balance Sheets Sheet http://www.acorda.com/20221231/taxonomy/role/Role_StatementConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 100020 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_StatementConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 100030 - Statement - Consolidated Statements of Operations Sheet http://www.acorda.com/20221231/taxonomy/role/Role_StatementConsolidatedStatementsOfOperations Consolidated Statements of Operations Statements 4 false false R5.htm 100040 - Statement - Consolidated Statements of Comprehensive Loss Sheet http://www.acorda.com/20221231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveLoss Consolidated Statements of Comprehensive Loss Statements 5 false false R6.htm 100050 - Statement - Consolidated Statements of Changes in Stockholders' Equity Sheet http://www.acorda.com/20221231/taxonomy/role/Role_StatementConsolidatedStatementsOfChangesInStockholdersEquity Consolidated Statements of Changes in Stockholders' Equity Statements 6 false false R7.htm 100070 - Statement - Consolidated Statements of Cash Flows Sheet http://www.acorda.com/20221231/taxonomy/role/Role_StatementConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 100080 - Disclosure - Organization and Business Activities Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureOrganizationAndBusinessActivities Organization and Business Activities Notes 8 false false R9.htm 100090 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 9 false false R10.htm 100100 - Disclosure - Leases Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLeases Leases Notes 10 false false R11.htm 100110 - Disclosure - Intangible Assets Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIntangibleAssets Intangible Assets Notes 11 false false R12.htm 100130 - Disclosure - Property and Equipment Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosurePropertyAndEquipment Property and Equipment Notes 12 false false R13.htm 100140 - Disclosure - Assets Held for Sale Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureAssetsHeldForSale Assets Held for Sale Notes 13 false false R14.htm 100150 - Disclosure - Common Stock Options and Restricted Stock Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStock Common Stock Options and Restricted Stock Notes 14 false false R15.htm 100160 - Disclosure - Debt Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureDebt Debt Notes 15 false false R16.htm 100170 - Disclosure - Liability Related to Sale of Future Royalties Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLiabilityRelatedToSaleOfFutureRoyalties Liability Related to Sale of Future Royalties Notes 16 false false R17.htm 100180 - Disclosure - Corporate Restructuring Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCorporateRestructuring Corporate Restructuring Notes 17 false false R18.htm 100190 - Disclosure - Accrued Expenses and Other Current Liabilities Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureAccruedExpensesAndOtherCurrentLiabilities Accrued Expenses and Other Current Liabilities Notes 18 false false R19.htm 100200 - Disclosure - Commitments and Contingencies Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 19 false false R20.htm 100210 - Disclosure - Fair Value Measurements Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureFairValueMeasurements Fair Value Measurements Notes 20 false false R21.htm 100220 - Disclosure - License, Research and Collaboration Agreements Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLicenseResearchAndCollaborationAgreements License, Research and Collaboration Agreements Notes 21 false false R22.htm 100230 - Disclosure - Income Taxes Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxes Income Taxes Notes 22 false false R23.htm 100240 - Disclosure - Loss Per Share Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureLossPerShare Loss Per Share Notes 23 false false R24.htm 100250 - Disclosure - Employee Benefit Plan Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureEmployeeBenefitPlan Employee Benefit Plan Notes 24 false false R25.htm 100260 - Disclosure - Subsequent Events Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureSubsequentEvents Subsequent Events Notes 25 false false R26.htm 100270 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies 26 false false R27.htm 100280 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPolicies 27 false false R28.htm 100290 - Disclosure - Leases (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLeasesTables Leases (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLeases 28 false false R29.htm 100300 - Disclosure - Intangible Assets (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIntangibleAssetsTables Intangible Assets (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIntangibleAssets 29 false false R30.htm 100310 - Disclosure - Property and Equipment (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosurePropertyAndEquipmentTables Property and Equipment (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosurePropertyAndEquipment 30 false false R31.htm 100320 - Disclosure - Common Stock Options and Restricted Stock (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStockTables Common Stock Options and Restricted Stock (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStock 31 false false R32.htm 100330 - Disclosure - Debt (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureDebtTables Debt (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureDebt 32 false false R33.htm 100340 - Disclosure - Liability Related to Sale of Future Royalties (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLiabilityRelatedToSaleOfFutureRoyaltiesTables Liability Related to Sale of Future Royalties (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLiabilityRelatedToSaleOfFutureRoyalties 33 false false R34.htm 100350 - Disclosure - Corporate Restructuring (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCorporateRestructuringTables Corporate Restructuring (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCorporateRestructuring 34 false false R35.htm 100360 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables Accrued Expenses and Other Current Liabilities (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureAccruedExpensesAndOtherCurrentLiabilities 35 false false R36.htm 100370 - Disclosure - Commitments and Contingencies (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesTables Commitments and Contingencies (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommitmentsAndContingencies 36 false false R37.htm 100380 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureFairValueMeasurements 37 false false R38.htm 100390 - Disclosure - Income Taxes (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesTables Income Taxes (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxes 38 false false R39.htm 100400 - Disclosure - Loss Per Share (Tables) Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureLossPerShareTables Loss Per Share (Tables) Tables http://www.acorda.com/20221231/taxonomy/role/DisclosureLossPerShare 39 false false R40.htm 100410 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails Summary of Significant Accounting Policies - Additional Information (Details) Details 40 false false R41.htm 100420 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details1) Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetails1 Summary of Significant Accounting Policies - Additional Information (Details1) Details 41 false false R42.htm 100430 - Disclosure - Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesReconciliationOfCashCashEquivalentsAndRestrictedCashDetails Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) Details 42 false false R43.htm 100440 - Disclosure - Summary of Significant Accounting Policies - Schedule of Major Classes of Inventory (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfMajorClassesOfInventoryDetails Summary of Significant Accounting Policies - Schedule of Major Classes of Inventory (Details) Details 43 false false R44.htm 100450 - Disclosure - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesDisaggregationOfRevenueDetails Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) Details 44 false false R45.htm 100460 - Disclosure - Summary of Significant Accounting Policies - Summary of Allowance for Cash Discounts (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfAllowanceForCashDiscountsDetails Summary of Significant Accounting Policies - Summary of Allowance for Cash Discounts (Details) Details 45 false false R46.htm 100470 - Disclosure - Leases - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLeasesAdditionalInformationDetails Leases - Additional Information (Details) Details 46 false false R47.htm 100480 - Disclosure - Leases - Schedule of ROU Assets and Lease Liabilities Related to Operating Leases (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLeasesScheduleOfROUAssetsAndLeaseLiabilitiesRelatedToOperatingLeasesDetails Leases - Schedule of ROU Assets and Lease Liabilities Related to Operating Leases (Details) Details 47 false false R48.htm 100490 - Disclosure - Leases - Components of Lease Costs (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLeasesComponentsOfLeaseCostsDetails Leases - Components of Lease Costs (Details) Details 48 false false R49.htm 100500 - Disclosure - Leases - Schedule of Future Minimum Commitments under all Non-Cancelable Operating Leases (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLeasesScheduleOfFutureMinimumCommitmentsUnderAllNonCancelableOperatingLeasesDetails Leases - Schedule of Future Minimum Commitments under all Non-Cancelable Operating Leases (Details) Details 49 false false R50.htm 100520 - Disclosure - Leases - Summary of Supplemental Cash Flow Information Related to Operating Leases (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureLeasesSummaryOfSupplementalCashFlowInformationRelatedToOperatingLeasesDetails Leases - Summary of Supplemental Cash Flow Information Related to Operating Leases (Details) Details 50 false false R51.htm 100530 - Disclosure - Intangible Assets - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIntangibleAssetsAdditionalInformationDetails Intangible Assets - Additional Information (Details) Details 51 false false R52.htm 100540 - Disclosure - Intangible Assets - Schedule of Intangible Assets (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIntangibleAssetsScheduleOfIntangibleAssetsDetails Intangible Assets - Schedule of Intangible Assets (Details) Details 52 false false R53.htm 100550 - Disclosure - Intangible Assets - Schedule of Estimated Future Amortization Expense for Intangible Assets (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIntangibleAssetsScheduleOfEstimatedFutureAmortizationExpenseForIntangibleAssetsDetails Intangible Assets - Schedule of Estimated Future Amortization Expense for Intangible Assets (Details) Details 53 false false R54.htm 100570 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosurePropertyAndEquipmentScheduleOfPropertyAndEquipmentDetails Property and Equipment - Schedule of Property and Equipment (Details) Details 54 false false R55.htm 100580 - Disclosure - Property and Equipment - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosurePropertyAndEquipmentAdditionalInformationDetails Property and Equipment - Additional Information (Details) Details 55 false false R56.htm 100590 - Disclosure - Assets Held for Sale - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureAssetsHeldForSaleAdditionalInformationDetails Assets Held for Sale - Additional Information (Details) Details 56 false false R57.htm 100600 - Disclosure - Common Stock Options and Restricted Stock - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStockAdditionalInformationDetails Common Stock Options and Restricted Stock - Additional Information (Details) Details 57 false false R58.htm 100610 - Disclosure - Common Stock Options and Restricted Stock - Schedule of Weighted Average Assumptions Using the Black-Scholes Option Pricing Model (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStockScheduleOfWeightedAverageAssumptionsUsingBlackScholesOptionPricingModelDetails Common Stock Options and Restricted Stock - Schedule of Weighted Average Assumptions Using the Black-Scholes Option Pricing Model (Details) Details 58 false false R59.htm 100620 - Disclosure - Common Stock Options and Restricted Stock - Schedule of Share-based Compensation Expense (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStockScheduleOfShareBasedCompensationExpenseDetails Common Stock Options and Restricted Stock - Schedule of Share-based Compensation Expense (Details) Details 59 false false R60.htm 100630 - Disclosure - Common Stock Options and Restricted Stock - Schedule of Stock Options Activity (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStockScheduleOfStockOptionsActivityDetails Common Stock Options and Restricted Stock - Schedule of Stock Options Activity (Details) Details 60 false false R61.htm 100640 - Disclosure - Common Stock Options and Restricted Stock - Schedule of Stock Options Activity, By Exercise Price Range (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStockScheduleOfStockOptionsActivityByExercisePriceRangeDetails Common Stock Options and Restricted Stock - Schedule of Stock Options Activity, By Exercise Price Range (Details) Details 61 false false R62.htm 100650 - Disclosure - Common Stock Options and Restricted Stock - Schedule of Restricted Stock Activity (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommonStockOptionsAndRestrictedStockScheduleOfRestrictedStockActivityDetails Common Stock Options and Restricted Stock - Schedule of Restricted Stock Activity (Details) Details 62 false false R63.htm 100660 - Disclosure - Debt - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureDebtAdditionalInformationDetails Debt - Additional Information (Details) Details 63 false false R64.htm 100670 - Disclosure - Debt - Summary of Outstanding Note Balances (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureDebtSummaryOfOutstandingNoteBalancesDetails Debt - Summary of Outstanding Note Balances (Details) Details 64 false false R65.htm 100680 - Disclosure - Debt - Schedule of Interest Expense Recognized Related to the Notes (Details) Notes http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureDebtScheduleOfInterestExpenseRecognizedRelatedToNotesDetails Debt - Schedule of Interest Expense Recognized Related to the Notes (Details) Details 65 false false R66.htm 100690 - Disclosure - Liability Related to Sale of Future Royalties - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLiabilityRelatedToSaleOfFutureRoyaltiesAdditionalInformationDetails Liability Related to Sale of Future Royalties - Additional Information (Details) Details 66 false false R67.htm 100700 - Disclosure - Liability Related to Sale of Future Royalties - Schedule of Activity Within Liability Related to Sale of Future Royalties (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLiabilityRelatedToSaleOfFutureRoyaltiesScheduleOfActivityWithinLiabilityRelatedToSaleOfFutureRoyaltiesDetails Liability Related to Sale of Future Royalties - Schedule of Activity Within Liability Related to Sale of Future Royalties (Details) Details 67 false false R68.htm 100710 - Disclosure - Corporate Restructuring - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCorporateRestructuringAdditionalInformationDetails Corporate Restructuring - Additional Information (Details) Details 68 false false R69.htm 100720 - Disclosure - Corporate Restructuring - Summary of Restructuring Costs (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCorporateRestructuringSummaryOfRestructuringCostsDetails Corporate Restructuring - Summary of Restructuring Costs (Details) Details 69 false false R70.htm 100730 - Disclosure - Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureAccruedExpensesAndOtherCurrentLiabilitiesScheduleOfAccruedExpensesAndOtherCurrentLiabilitiesDetails Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) Details 70 false false R71.htm 100740 - Disclosure - Commitments and Contingencies - Summary of Minimum Significant Contractual Obligations (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesSummaryOfMinimumSignificantContractualObligationsDetails Commitments and Contingencies - Summary of Minimum Significant Contractual Obligations (Details) Details 71 false false R72.htm 100750 - Disclosure - Commitments and Contingencies - Summary of Minimum Significant Contractual Obligations (Parenthetical) (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesSummaryOfMinimumSignificantContractualObligationsParentheticalDetails Commitments and Contingencies - Summary of Minimum Significant Contractual Obligations (Parenthetical) (Details) Details 72 false false R73.htm 100760 - Disclosure - Commitments and Contingencies - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetails Commitments and Contingencies - Additional Information (Details) Details 73 false false R74.htm 100770 - Disclosure - Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureFairValueMeasurementsScheduleOfAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Details 74 false false R75.htm 100780 - Disclosure - Fair Value Measurements - Schedule of Contingent Liabilities (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureFairValueMeasurementsScheduleOfContingentLiabilitiesDetails Fair Value Measurements - Schedule of Contingent Liabilities (Details) Details 75 false false R76.htm 100790 - Disclosure - Fair Value Measurements - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureFairValueMeasurementsAdditionalInformationDetails Fair Value Measurements - Additional Information (Details) Details 76 false false R77.htm 100800 - Disclosure - Fair Value Measurements - Schedule of Fair Value Reconciliation of Derivative Liability (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureFairValueMeasurementsScheduleOfFairValueReconciliationOfDerivativeLiabilityDetails Fair Value Measurements - Schedule of Fair Value Reconciliation of Derivative Liability (Details) Details 77 false false R78.htm 100810 - Disclosure - License, Research and Collaboration Agreements - Alkermes License - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLicenseResearchAndCollaborationAgreementsAlkermesLicenseAdditionalInformationDetails License, Research and Collaboration Agreements - Alkermes License - Additional Information (Details) Details 78 false false R79.htm 100820 - Disclosure - License, Research and Collaboration Agreements - Supply Agreement - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLicenseResearchAndCollaborationAgreementsSupplyAgreementAdditionalInformationDetails License, Research and Collaboration Agreements - Supply Agreement - Additional Information (Details) Details 79 false false R80.htm 100830 - Disclosure - License, Research and Collaboration Agreements - Biogen Agreement - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureLicenseResearchAndCollaborationAgreementsBiogenAgreementAdditionalInformationDetails License, Research and Collaboration Agreements - Biogen Agreement - Additional Information (Details) Details 80 false false R81.htm 100840 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 81 false false R82.htm 100850 - Disclosure - Income Taxes - Schedule of Domestic and Foreign Components of (Loss) Income Before Income Taxes (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesScheduleOfDomesticAndForeignComponentsOfLossIncomeBeforeIncomeTaxesDetails Income Taxes - Schedule of Domestic and Foreign Components of (Loss) Income Before Income Taxes (Details) Details 82 false false R83.htm 100860 - Disclosure - Income Taxes - Schedule of Benefit from Income Taxes (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesScheduleOfBenefitFromIncomeTaxesDetails Income Taxes - Schedule of Benefit from Income Taxes (Details) Details 83 false false R84.htm 100870 - Disclosure - Income Taxes - Schedule of Reconciliation of the Statutory U.S. Federal Income Tax Rate to the Entity's Effective Income Tax Rate (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesScheduleOfReconciliationOfStatutoryUSFederalIncomeTaxRateToEntitySEffectiveIncomeTaxRateDetails Income Taxes - Schedule of Reconciliation of the Statutory U.S. Federal Income Tax Rate to the Entity's Effective Income Tax Rate (Details) Details 84 false false R85.htm 100880 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetails Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) Details 85 false false R86.htm 100890 - Disclosure - Income Taxes - Schedule of Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesScheduleOfReconciliationOfBeginningAndEndingAmountsOfUnrecognizedTaxBenefitsDetails Income Taxes - Schedule of Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits (Details) Details 86 false false R87.htm 100900 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amounts of Valuation Allowances (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureIncomeTaxesReconciliationOfBeginningAndEndingAmountsOfValuationAllowancesDetails Income Taxes - Reconciliation of Beginning and Ending Amounts of Valuation Allowances (Details) Details 87 false false R88.htm 100910 - Disclosure - Loss Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureLossPerShareScheduleOfComputationOfBasicAndDilutedEarningsPerShareDetails Loss Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) Details 88 false false R89.htm 100920 - Disclosure - Loss Per Share - Schedule of Antidilutive Securities Excluded from Calculation of Net Income Per Diluted Share (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureLossPerShareScheduleOfAntidilutiveSecuritiesExcludedFromCalculationOfNetIncomePerDilutedShareDetails Loss Per Share - Schedule of Antidilutive Securities Excluded from Calculation of Net Income Per Diluted Share (Details) Details 89 false false R90.htm 100930 - Disclosure - Employee Benefit Plan - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/Role_DisclosureEmployeeBenefitPlanAdditionalInformationDetails Employee Benefit Plan - Additional Information (Details) Details 90 false false R91.htm 100940 - Disclosure - Subsequent Events - Additional Information (Details) Sheet http://www.acorda.com/20221231/taxonomy/role/DisclosureSubsequentEventsAdditionalInformationDetails Subsequent Events - Additional Information (Details) Details 91 false false All Reports Book All Reports [ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 7 fact(s) appearing in ix:hidden were eligible for transformation: acor:DebtInstrumentDebtDefaultFailureToConvertNotesPeriod, dei:CurrentFiscalYearEndDate, us-gaap:PropertyPlantAndEquipmentUsefulLife, us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod, us-gaap:StockholdersEquityNoteStockSplitConversionRatio1 - acor-20221231.htm 8 acor-20221231.htm acor-20221231.xsd acor-20221231_cal.xml acor-20221231_def.xml acor-20221231_lab.xml acor-20221231_pre.xml acor-ex10_53.htm acor-ex10_54.htm acor-ex10_55.htm acor-ex10_56.htm acor-ex10_57.htm acor-ex21.htm acor-ex23.htm acor-ex31_1.htm acor-ex31_2.htm acor-ex32_1.htm acor-ex32_2.htm http://fasb.org/srt/2022 http://fasb.org/us-gaap/2022 http://xbrl.sec.gov/dei/2022 true true