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Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Equity Component [Domain] Equity Component [Domain] Financial Instrument [Axis] Financial Instrument [Axis] Other Manufactured Product, Other [Member] Fair value gain (loss) recognized in earnings Change in fair value recognized in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Additional 402(v) Disclosure Additional 402(v) Disclosure [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 Contingent consideration expense (gain) Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Title Trading Arrangement, Individual Title Consolidated Entities [Axis] Consolidated Entities [Axis] Statement [Table] Statement [Table] Interest expense Interest expense Interest Expense, Debt Measurement Frequency [Domain] Measurement Frequency [Domain] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] City Area Code City Area Code Current liabilities Liabilities, Current [Abstract] Contingent consideration Contingent consideration Business Combination, Contingent Consideration, Liability Cash paid for interest on debt Interest Paid, Excluding Capitalized Interest, Operating Activities Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Total current assets Assets, Current Schedule of interest expense Interest Income and Interest Expense Disclosure [Table Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Noncash operating activities Noncash Investing and Financing Items [Abstract] Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Weighted Average Grant Date Fair Value per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Income Tax Expense (Benefit) Income Tax Disclosure [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Retained earnings Retained Earnings (Accumulated Deficit) Annual minimum purchase quantity requirement amount Purchase Commitment, Annual Minimum Amount Committed Purchase Commitment, Annual Minimum Amount Committed Inventories Increase (Decrease) in Inventories Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accrued Liabilities and Other Current Liabilities [Table Text Block] Tabular disclosure of the components of accrued liabilities and other current liabilities. Litigation settlement Litigation Settlement, Amount Awarded to Other Party Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Number of commercial products Number Of Commercial Products Number Of Commercial Products Total lease liabilities Operating Lease, Liability Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Total PSUs Performance Shares [Member] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Credit Facility [Axis] Credit Facility [Axis] 2021 Equity Incentive Plan 2021 Equity Incentive Plan [Member] 2021 Equity Incentive Plan Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Depreciation and amortization Depreciation, Depletion and Amortization Fair Value as of Grant Date Award Grant Date Fair Value Subsequent Commercial Product Launch Subsequent Commercial Product Launch [Member] Subsequent Commercial Product Launch Subsequent Events [Abstract] Marketable securities - restricted (SERP) Assets for Plan Benefits, Defined Benefit Plan Level 2 Fair Value, Inputs, Level 2 [Member] Debt Debt Disclosure [Text Block] Remaining Weighted Average Life (Years) Finite-Lived Intangible Assets, Remaining Amortization Period Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Debt instrument, face amount Debt Instrument, Face Amount Disaggregation of Revenues 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 Marketable securities Corporate, U.S. government agency and municipal debt securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current Proceeds from Credit Line Proceeds from Short-Term Debt Stock option and Stock Appreciation Rights Stock Option Stock Appreciation Rights [Member] Represents information related to stock option awards for employees and non-employees as well as stock appreciation rights. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Advertising expense Advertising Expense Schedule of Share-Based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Consolidation Consolidation, Policy [Policy Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Collaborative arrangement, payment for one time fee Collaborative Arrangement, Payment For One Time Fee Collaborative Arrangement, Payment For One Time Fee Title of 12(b) Security Title of 12(b) Security Long-term Purchase Commitment [Table] Long-Term Purchase Commitment [Table] Common stock, $0.001 par value; 130,000,000 shares authorized; 55,046,049 and 54,723,356 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively Common Stock, Value, Issued Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value 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 Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Indefinite-lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Stock options, RSUs, PSUs Share-Based Payment Arrangement [Member] Number of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Raw materials Inventory, Work in Process and Raw Materials, Net of Reserves Basic (in dollars per share) Earnings (loss) per share, basic (in dollars per share) Earnings Per Share, Basic Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Cash paid for operating leases Operating Lease, Payments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Collaborative arrangement agreement termination notice period Collaborative Arrangement Agreement Termination Notice Period Collaborative Arrangement Agreement Termination Notice Period Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Numerator for dilutive earnings (loss) per share Net Income (Loss) Available to Common Stockholders, Basic Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total assets Assets Performance-Based Units Performance Based Units [Member] Performance Based Units Cost of goods sold Cost of Goods and Services Sold Additional cash payments upon milestone achievements maximum Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Advertising Expense Advertising Cost [Policy Text Block] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Cash and cash equivalents Cash and Cash Equivalents [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Other liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Commitments and contingencies (Note 15) Commitments and Contingencies Accrued royalties Accrued Royalties, Current Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Termination Date Trading Arrangement Termination Date Business Organization Nature of Operations [Text Block] Fair value of financial instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Payments on Credit Line Repayments of Short-Term Debt Share-Based Payments Share-Based Payment Arrangement [Text Block] Adamas Acquisition Adamas [Member] Adamas Entity Address, City or Town Entity Address, City or Town Summary of Stock Options and SAR Activities Share-Based Payment Arrangement, Option, Activity [Table Text Block] Share-based compensation expense Share-Based Payment Arrangement, Expense Net earnings (loss) Net earnings (loss) Net earnings (loss) Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Investments, Debt and Equity Securities [Abstract] Oxtellar XR Oxtellar X R [Member] Represents information pertaining to Oxtellar XR product. Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Business Acquisition [Axis] Business Acquisition [Axis] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Navitor Pharmaceuticals, Inc. Navitor Pharmaceuticals, Inc. [Member] Navitor Pharmaceuticals, Inc. Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Entity File Number Entity File Number 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 Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Disaggregated Revenues Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Total Other Nonoperating Expense Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One The Milestones Milestone 2024 and Milestone 2025 [Member] Milestone 2024 and Milestone 2025 Qelbree Qelbree [Member] Qelbree Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Other accrued expenses Other Accrued Liabilities, Current Total assets at fair value Assets, Fair Value Disclosure Name Forgone Recovery, Individual Name Document Period End Date Document Period End Date VIE, qualitative or quantitative information, ownership percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Finished goods Inventory, Finished Goods, Net of Reserves Other noncash adjustments, net Other Noncash Income (Expense) Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Nonvested, beginning balance (in shares) Nonvested, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Insider Trading Arrangements [Line Items] Uncommitted Secured Credit Line Uncommitted Secured Credit Line [Member] Uncommitted Secured Credit Line Composition of Other Balance Sheet Items Supplemental Balance Sheet Disclosures [Text Block] Summary of Performance Stock Unit Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Adjustment to Compensation: Adjustment to Compensation [Axis] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Litigation Case [Domain] Litigation Case [Domain] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accumulated other comprehensive loss, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Basic (in shares) Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] RSUs Restricted Stock Units (RSUs) [Member] Amortization of deferred financing costs and debt discount Noncash interest expense on debt Amortization of Debt Issuance Costs and Discounts Additional cash payments upon milestone achievements minimum Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Accrued sales & marketing Accrued Professional Fees, Current Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Accrued manufacturing expenses Accrued manufacturing expenses Accrued manufacturing expenses Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Non-cash royalty revenue Revenue From Royalty Agreement Represents revenue from the sale of certain royalty and milestone rights. Entity Filer Category Entity Filer Category Convertible notes (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-Sale Company Selected Measure Name Company Selected Measure Name