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Insider Trading Arrangements [Line Items] Schedule of fair value of the financial assets and liabilities Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Schedule of Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Entity Registrant Name Entity Registrant Name Corporate, U.S. government agency and municipal debt securities Corporate And U.S. Government Agency And Municipal Debt Securities [Member] Corporate And U.S. Government Agency And Municipal Debt Securities Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Stock options, RSUs and SARs (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Adjustment to Compensation, Amount Adjustment to Compensation Amount Contingent consideration gain Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Document Period End Date Document Period End Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Entity Central Index Key Entity Central Index Key Amortization of deferred financing costs and debt discount Noncash interest expense on debt Amortization of Debt Issuance Costs and Discounts Liabilities: Liabilities, Fair Value Disclosure [Abstract] Share-based compensation expense Share-Based Payment Arrangement, Expense Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Carrying Amount, Gross Finite-Lived Intangible Assets, Gross Income tax expense (benefit) Income tax expense (benefit) Income Tax Expense (Benefit) Finished goods Inventory, Finished Goods, Net of Reserves Accrued compensation, benefits, & related accruals Employee-related Liabilities, Current Fair Value of Financial Measurements Fair Value Disclosures [Text Block] Number of operating segments Number of Operating Segments Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalents [Abstract] Other comprehensive gain Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Summary of disaggregation of revenues by nature Disaggregation of Revenue [Table Text Block] Issuance of common stock related to employee stock purchase plan and share-based awards, net of taxes withheld Stock Issued During Period, Value, New Issues Performance-Based Units Performance Based Units [Member] Performance Based Units Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Money market funds Money Market Funds [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Summary of performance stock unit Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Assets: Assets, Fair Value Disclosure [Abstract] Less than 1 year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Credit Facility [Domain] Credit Facility [Domain] Adamas Acquisition Adamas [Member] Adamas Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Loss contingency, damages sought, value Loss Contingency, Damages Sought, Value Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Leasehold improvements Leasehold Improvements [Member] Diluted (in shares) Weighted average shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Oxtellar XR Oxtellar X R [Member] Represents information pertaining to Oxtellar XR product. Long-term marketable securities Debt Securities, Noncurrent [Abstract] Disaggregated Revenues Revenue from Contract with Customer [Text Block] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Additional  Paid-in Capital Additional Paid-in Capital [Member] Effect of dilutive securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] GOCOVRI GOCOVRI [Member] GOCOVRI Contingent consideration arrangements, excess acquisition date fair value, term Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Excess Acquisition Date Fair Value, Term Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Excess Acquisition Date Fair Value, Term Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Cover page. Cover [Abstract] The Milestones Milestone 2024 and Milestone 2025 [Member] Milestone 2024 and Milestone 2025 Qelbree Qelbree [Member] Qelbree Subsequent Events Subsequent Events [Text Block] Share-based compensation expense related to employee stock purchase plan and share-based awards APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Recurring Fair Value, Recurring [Member] Other liabilities Other Liabilities, Noncurrent Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Uncommitted Secured Credit Line Uncommitted Secured Credit Line [Member] Uncommitted Secured Credit Line Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Net change in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Work in process Inventory, Work in Process, Net of Reserves Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Notes payable Debt Instrument [Line Items] Basic (in shares) Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Concentration Risk Type [Domain] Concentration Risk Type [Domain] Operating earnings (loss) Operating Income (Loss) Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Schedule of Indefinite-Lived Intangible Assets [Table] Schedule of Indefinite-Lived Intangible Assets [Table] Revenues Revenues [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement [Line Items] Statement Statement [Line Items] Vested and expected to vest (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Accrued manufacturing expenses Accrued manufacturing expenses Accrued manufacturing expenses Non-cash royalty revenue Revenue From Royalty Agreement Represents revenue from the sale of certain royalty and milestone rights.