Agreement termination notice period Variable Interest Entity, Agreement Termination Notice, Period Variable Interest Entity, Agreement Termination Notice, Period Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Customer [Domain] Customer [Domain] Convertible Debt Convertible Debt [Member] Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Leasehold improvements Leasehold Improvements [Member] Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Net earnings Net earnings Net Income (Loss) Attributable to Parent Consolidated Entities [Axis] Consolidated Entities [Axis] Operating lease assets Operating Lease, Right-of-Use Asset Corporate and municipal debt securities Debt Securities, Available-for-sale, Current Accrued compensation Employee-related Liabilities, Current Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Current Assets Amount of increase (decrease) in prepaid expenses, and other current assets. Income Statement Location [Axis] Income Statement Location [Axis] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Statistical Measurement [Domain] Statistical Measurement [Domain] Additional cash payments upon milestone achievements maximum Business Combination, Contingent Consideration Arrangements, Consecutive Twelve-Month Net Sales Threshold, Period Two Business Combination, Contingent Consideration Arrangements, Consecutive Twelve-Month Net Sales Threshold, Period Two Security Exchange Name Security Exchange Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Conversion price, per share of common stock (in dollars per share) Debt Instrument, Convertible, Conversion Price APOKYN and SPN-830 APOKYN And SPN-830 [Member] APOKYN And SPN-830 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 Payment of contingent consideration Payment of contingent consideration Payment for Contingent Consideration Liability, Financing Activities Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Other assets Other Assets, Noncurrent Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Investment, Name [Axis] Investment, Name [Axis] Acquired in-process research and development In Process Research and Development [Member] Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Entity File Number Entity File Number Share-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Change in fair value recognized in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Goodwill Goodwill, Purchase Accounting Adjustments Number of renewal options Lessee, Operating Lease, Number Of Renewal Options Lessee, Operating Lease, Number Of Renewal Options Leases Lessee, Lease, Description [Line Items] Debt Conversion, Name [Domain] Debt Conversion, Name [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Amortization of intangible assets Amortization of Intangible Assets Intangibles Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill 3 years to 4 years Available For Sale Securities Debt Maturities Three Years Through Four Years Fair Value Fair value of available-for-sale debt securities maturing in the third fiscal year through the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Convertible notes Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Schedule of inventories Schedule of Inventory, Current [Table Text Block] Common stock equivalents excluded in the calculation of diluted income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Conversion Circumstance Two Conversion Circumstance Two [Member] Conversion Circumstance Two Research and development Research and Development Expense [Member] Subsequent Events [Abstract] Business Combination and Asset Acquisition [Abstract] Granted (in dollars per share) Weighted average fair value, grant date, (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Business Acquisition [Axis] Business Acquisition [Axis] SPN-830 First Commercial And Sale Milestone SPN-830 First Commercial And Sale [Member] SPN-830 First Commercial And Sale Total fair value of assets acquired Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Acquired Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Acquired Summary of performance stock unit Share-based Payment Arrangement, Performance Shares, Activity [Table Text Block] Award Type [Domain] Award Type [Domain] Other Manufactured Product, Other [Member] Summary of liability component of 2023 Notes Convertible Debt [Table Text Block] Local Phone Number Local Phone Number Assets Assets [Abstract] Schedule of unrestricted available-for-sale marketable securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Long-term marketable securities Debt Securities, Noncurrent [Abstract] NAMENDA XR/Namzaric Qui Tam Litigation NAMENDA XR/Namzaric Qui Tam Litigation [Member] NAMENDA XR/Namzaric Qui Tam Litigation Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Vested and expected to vest (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Schedule of contractual maturities of the unrestricted available-for-sale marketable securities held Investments Classified by Contractual Maturity Date [Table Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Goodwill and Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Concentration risk percentage (more than) Concentration Risk, Percentage New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Outstanding at the beginning of the period (in shares) Outstanding at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Consecutive trading day period (in days) Debt Instrument, Convertible, Threshold Consecutive Trading Days Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Cash distributions received Proceeds from Divestiture of Businesses and Interests in Affiliates Retained Earnings Retained Earnings [Member] Advertising Expense Advertising Cost [Policy Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] VIE, qualitative or quantitative information, ownership percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Accrued product returns Accrued Product Returns Represents the amount of accrued product returns. Accounts receivable Increase (Decrease) in Accounts Receivable Capital Expenditures Incurred but Not yet Paid Capital Expenditures Incurred but Not yet Paid Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Business acquisition, pro forma information Business Acquisition, Pro Forma Information [Table Text Block] Property and equipment Property, Plant and Equipment [Line Items] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Number of operating segments Number of Operating Segments Share-based payments Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Basic (in dollars per share) Earnings per share, basic (in dollars per share) Earnings Per Share, Basic Contingent consideration, current portion Business Combination, Contingent Consideration, Liability, Current Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Disaggregated Revenues Revenue from Contract with Customer [Text Block] Revenue Recognition Revenue, Initial Application Period Cumulative Effect Transition [Line Items] 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 Balance at December 31, 2021 Balance at March 31, 2022 (unaudited) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Interest expense Interest Expense, Debt Summary of disaggregation of revenues by nature Disaggregation of Revenue [Table Text Block] Amortization of premium/discount on marketable securities Investment Income, Net, Amortization of Discount and Premium Number of RSUs Number of PSUs Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Change in fair value of contingent consideration Unrealized Gain (Loss) on Derivatives Adamas Pharmaceuticals Adamas Pharmaceuticals [Member] Adamas Pharmaceuticals Cumulative effect of adoption of ASU 2020-06 Cumulative Effect, Period of Adoption, Adjustment [Member] Marketable securities - restricted (SERP) Assets for Plan Benefits, Defined Benefit Plan Purchases of property and equipment and deferred legal fees paid Payments To Acquire Property, Plant, And Equipment, And Deferred Legal Fees Payments To Acquire Property, Plant, And Equipment, And Deferred Legal Fees 1 year to 2 years Available For Sale Securities Debt Maturities After One Through Two Years Fair Value Fair value of available-for-sale debt securities maturing after the first year through the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Net deferred tax liabilities Deferred Tax Liabilities, Net Cash paid for operating leases Operating Lease, Payments Other noncash adjustments, net Other Noncash Income (Expense) Additional cash payments upon milestone achievements minimum Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Accrued clinical trial costs Accrued Clinical Trial and Clinical Supply Costs Current Represents the amount of clinical trial and clinical supply costs accrued. Lease liabilities, current Lease Liabilities, Current [Abstract] Lease Liabilities, Current Total purchase price Business Combination, Consideration Transferred 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] Goodwill [Roll Forward] Goodwill [Roll Forward] APOKYN APOKYN [Member] APOKYN Accrued product costs Inventory Adjustments Assets: Assets, Fair Value Disclosure [Abstract] Long-term Debt Long-term Debt Total assets at fair value Total assets at fair value Assets, Fair Value Disclosure Level 1 Fair Value, Inputs, Level 1 [Member] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Entity Small Business Entity Small Business Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Total liabilities and stockholders’ equity Liabilities and Equity Other accrued expenses Other Accrued Liabilities, Current Investments, Debt and Equity Securities [Abstract] Other Income and Expenses [Abstract] Other Income and Expenses [Abstract] Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Additional paid-in capital Additional Paid in Capital Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Liabilities and stockholders’ equity Liabilities and Equity [Abstract] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Earnings per Share Earnings Per Share [Text Block] Entity Interactive Data Current Entity Interactive Data Current 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Four Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Sales-based contingent consideration liabilities Sales-Based Contingent Consideration Liability [Member] Sales-Based Contingent Consideration Liability Minimum Minimum [Member] Accrued product rebates Accrued Rebates Represents the amount of accrued rebates. Contingent consideration expense Contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Marketable securities Marketable Securities, Current Total identifiable net assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Identifiable Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Identifiable Assets SPN-830 NDA Approval Milestone SPN-830 NDA Approval Milestone [Member] SPN-830 NDA Approval Milestone Schedule of fair value of the financial assets and liabilities Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Conversion rate for the notes (in shares per $1,000 principal amount) Debt Instrument, Convertible, Conversion Ratio Schedule of financial liabilities that are not carried at fair value Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block] Total liabilities at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Selling, general and administrative Selling, General and Administrative Expense Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gross unrealized gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Entity Address, State or Province Entity Address, State or Province Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] USWM Acquisition MDD US Enterprises LLC (Formerly USWM Enterprises) [Member] MDD US Enterprises LLC (Formerly USWM Enterprises) Leases Lessee, Finance Leases [Text Block] Regulatory and developmental contingent consideration liabilities Regulatory And Developmental Contingent Consideration Liability [Member] Regulatory And Developmental Contingent Consideration Liability Other assets Other Assets, Noncurrent [Abstract] Loss contingency, damages sought, value Loss Contingency, Damages Sought, Value Current liabilities Liabilities, Current [Abstract] Issuance of common stock in connection with the Company’s equity award plans Stock Issued During Period, Value, New Issues Market-Based Units Market Based Units [Member] Market Based Units Restatement [Axis] Revision of Prior Period [Axis] Balance (in shares) Balance (in shares) Shares, Outstanding Exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-Based Payments Share-based Payment Arrangement [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Accounting Policies [Abstract] Accounting Policies [Abstract] Outstanding at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Issuance of common stock in connection with the Company’s equity award plans (in shares) Stock Issued During Period, Shares, New Issues Accrued product returns and rebates Total Accrued Product Returns and Rebates. Carrying value as of the balance sheet date of accrued product returns and rebates. Accrued professional fees Accrued Professional Fees, Current Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Lease liabilities, long-term Lease Liabilities, Noncurrent [Abstract] Lease Liabilities, Noncurrent Document Transition Report Document Transition Report Schedule of interest expense Interest Income and Interest Expense Disclosure [Table Text Block] Common stock, $0.001 par value; 130,000,000 shares authorized; 53,386,305 and 53,256,094 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively Common Stock, Value, Issued Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total other income (expense) Nonoperating Income (Expense) Nonvested, beginning balance (in dollars per share) Nonvested, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Customer Concentration Risk Customer Concentration Risk [Member] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Total PSUs Performance Shares [Member] Accumulated other comprehensive earnings (loss), net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Emerging Growth Company Entity Emerging Growth Company Acquisition Business Combination Disclosure [Text Block] Accrued product returns and rebates Increase (Decrease) In Accrued Product Returns And Rebates Amount of increase (decrease) in product returns and rebates. Interest Expense Other Nonoperating Income and Expense [Text Block] SPN-830 FDA Acceptance Milestone SPN-830 FDA Acceptance Milestone [Member] SPN-830 FDA Acceptance Milestone Product Concentration Risk Product Concentration Risk [Member] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Legal Entity [Axis] Legal Entity [Axis] Cover page. Cover [Abstract] Stock options, RSU and SAR (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Deferred income tax liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deferred Income Tax Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Deferred Income Tax Liabilities Total costs and expenses Costs and Expenses Pro forma net loss Business Acquisition, Pro Forma Net Income (Loss) Balance, January 1, 2022 Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Raw materials Inventory, Work in Process and Raw Materials, Net of Reserves Warrants issued (in shares) Class of Warrant or Right, Outstanding Work in process Inventory, Work in Process, Net of Reserves Operating lease liabilities, long-term Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Liability, Noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Lease, Liability, Noncurrent Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Convertible note hedge options issued (in shares) Debt Conversion, Converted Instrument, Warrants or Options Issued Other liabilities Other Liabilities [Table Text Block] Other income from Navitor (see Note 5) Payments For (Proceeds From) Collaborative Arrangement, Investment Payments For (Proceeds From) Collaborative Arrangement, Investment Financial Instrument [Axis] Financial Instrument [Axis] Total Accrued Liabilities, Current Selling, general and administrative Selling, General and Administrative Expenses [Member] Entity [Domain] Entity [Domain] Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Finished goods Inventory, Finished Goods, Net of Reserves Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Document Quarterly Report Document Quarterly Report Nonrecourse liability related to sale of future royalties, long-term Non-Recourse Liability, Noncurrent Non-Recourse Liability, Noncurrent Threshold for development costs payments Collaborative Arrangement, Threshold For Development Costs Payments Collaborative Arrangement, Threshold For Development Costs Payments Convertible Notes Convertible Notes Payable [Member] Common Stock Common Stock [Member] Other income (expense) Other Nonoperating Income (Expense) [Abstract] Operating earnings Operating Income (Loss) Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Operating lease liabilities, current portion Operating Lease, Liability, Current Gross unrealized losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 2024 Finite-Lived Intangible Asset, Expected Amortization, Year Two Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Document Fiscal Year Focus Document Fiscal Year Focus 2 years to 3 years Available For Sale Securities Debt Maturities Two Years Through Three Years Fair Value Fair value of available-for-sale debt securities maturing in the second fiscal year through the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Share-based compensation expense Share-based Payment Arrangement, Noncash Expense Additional  Paid-in Capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and Cash Equivalents [Abstract] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] As Initially Reported Previously Reported [Member] Capitalized patent defense costs Patent Defense Costs [Member] Represents information concerning the capitalized patent defense costs related to the Watson litigation. Realized gains from sales of marketable securities Marketable Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment Loss Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Cardinal Health Cardinal Health [Member] Cardinal Health Interest and other income, net Other Nonoperating Income (Expense) Deferred legal fees and fixed assets included in accounts payable and accrued expenses Non Cash Capitalized Cost Of Intangible Assets Represents the non-cash expenses related to intangible assets that were capitalized and shown within accrued expenses. Other current liabilities Other Liabilities, Current Finite-lived and indefinite-lived intangible assets acquired as part of business combination Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] Business Combinations [Abstract] Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Contingent Consideration Contingent Consideration Disclosure [Text Block] Contingent Consideration Disclosure Total liabilities Liabilities Award Type [Axis] Award Type [Axis] 2023 Finite-Lived Intangible Asset, Expected Amortization, Year One Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Total stockholders’ equity Balance Balance Stockholders' equity Stockholders' Equity Attributable to Parent Other assets Change in fair value of operating lease acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets Additional cash payments upon milestone achievements minimum Business Combination, Contingent Consideration Arrangements, Consecutive Twelve-Month Net Sales Threshold, Period One Business Combination, Contingent Consideration Arrangements, Consecutive Twelve-Month Net Sales Threshold, Period One Common stock shares issued (in shares) Common Stock, Shares, Issued City Area Code City Area Code Milestone payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Schedule of balance sheet information related to leases Lessee, Operating and Finance Lease, Balance Sheet Disclosure [Table Text Block] Lessee, Operating and Finance Lease, Balance Sheet Disclosure Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Commitment period Long-term Purchase Commitment, Period Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Entity Address, City or Town Entity Address, City or Town After-tax interest expense for 2023 Notes Interest on Convertible Debt, Net of Tax Stockholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Noncash investing and financing activities Noncash Investing and Financing Items [Abstract] Schedule of Indefinite-Lived Intangible Assets [Table] Schedule of Indefinite-Lived Intangible Assets [Table] Operating lease liabilities, long-term Operating lease liabilities, long-term Operating Lease, Liability, Noncurrent Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Principal amount of debt 2023 Notes Debt Instrument, Face Amount Trokendi XR Trokendi Xr [Member] Represents information pertaining to Trokendi XR patent litigation. Interest expense Total Interest Expense Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Retained earnings Retained Earnings (Accumulated Deficit) Stock options, RSUs Share-based Payment Arrangement [Member] Litigation Case [Domain] Litigation Case [Domain] RSUs Restricted Stock Units (RSUs) [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Restatement [Domain] Revision of Prior Period [Domain] Schedule of recognized identified assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Entity Filer Category Entity Filer Category Business Acquisition [Line Items] Business Acquisition [Line Items] Debt Conversion Description [Axis] Debt Conversion Description [Axis] Income Statement [Abstract] Income Statement [Abstract] Entity Registrant Name Entity Registrant Name Weighted Average Remaining Contractual Term (in years) Share Based Compensation Arrangement by Share Based Payment Award Options Weighted Average Remaining Contractual Term [Abstract] Reconciliation of the Beginning and Ending Balances Related to the Contingent Consideration Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Acquired in-process research and development Indefinite-lived Intangible Assets (Excluding Goodwill) Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Income tax (benefit) expense Income Tax Expense (Benefit) Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Amendment Flag Amendment Flag Equity Components [Axis] Equity Components [Axis] Entity Tax Identification Number Entity Tax Identification Number Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Concentration Risk Type [Domain] Concentration Risk Type [Domain] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Forfeited (in shares) Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Inventories, net Total inventories Inventory, Net Three Major Customers Three Major Customers [Member] Three Major Customers Fair value of financial instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Contingent consideration, long-term Business Combination, Contingent Consideration, Liability, Noncurrent Marketable securities Debt Securities, Current [Abstract] Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Equity Component [Domain] Equity Component [Domain] Lab equipment and furniture Lab Equipment And Furniture [Member] Represents information pertaining to lab equipment and furniture. Lease assets and tenant receivable obtained for new operating leases Right-of-Use Asset Obtained In Exchange For Operating And Finance Lease Liability Right-of-Use Asset Obtained In Exchange For Operating And Finance Lease Liability Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Long-term marketable securities Marketable Securities, Noncurrent Contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Excess Acquisition Date Fair Value Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Excess Acquisition Date Fair Value Statement [Line Items] Statement Statement [Line Items] Litigation Case [Axis] Litigation Case [Axis] Conversion option stock price trigger (in dollars per share) Debt Instrument, Convertible, Stock Price Trigger Payment to resolve U.S. Department of Justice allegations Litigation Settlement, Amount Awarded to Other Party Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Corporate and municipal debt securities Debt Securities, Available-for-sale, Noncurrent Liabilities Liabilities [Abstract] McKesson McKesson [Member] McKesson Total fair value Total Debt Securities, Available-for-sale Additional cash payments upon milestone achievements maximum Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High Fair Value (Level 2) Convertible Debt, Fair Value Disclosures Total intangible assets, carrying amount, gross Intangible Assets, Gross (Excluding Goodwill) Debt Disclosure [Abstract] Debt Disclosure [Abstract] Purchases of marketable securities Payments to Acquire Marketable Securities Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Level 2 Fair Value, Inputs, Level 2 [Member] Number of shares per warrant entitled to holder (in shares) Class of Warrant or Right, Number of Shares in Which Holder Can be Entitled per Warrants at Strike Price Represents the information pertaining to the shares per warrant entitled to holders at strike price. Type of Adoption [Domain] Accounting Standards Update [Domain] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Schedule of Intangible Assets and Goodwill Schedule of Intangible Assets and Goodwill [Table Text Block] Allowance for expected sales discounts and allowances Allowance for Expected Sales deductions Represents the allowance for sales discounts related to prompt-pay discounts and contractual fee for service arrangements to wholesalers and distributors. Amortized cost Debt Securities, Available-for-sale, Amortized Cost Estimated Useful Life as of Closing Date (in years) Finite-Lived Intangible Asset, Useful Life Contingents value rights Business Combination, Contingent Consideration, Number Of Contingent Value Rights Per Common Share Business Combination, Contingent Consideration, Number Of Contingent Value Rights Per Common Share Customer [Axis] Customer [Axis] Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Threshold trading days (whether or not consecutive) Debt Instrument, Convertible, Threshold Trading Days Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of share-based compensation expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Title of 12(b) Security Title of 12(b) Security Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Total assets Assets Investment, Name [Domain] Investment, Name [Domain] Common stock shares authorized (in shares) Common Stock, Shares Authorized Cash paid for interest on convertible notes Interest Paid, Excluding Capitalized Interest, Operating Activities Numerator for dilutive earnings per share Net Income (Loss) Available to Common Stockholders, Basic Document Type Document Type Research and development Research and Development Expense Product and Service [Domain] Product and Service [Domain] Schedule of accrued product returns and rebates Schedule of Accrued Product Returns and Rebates [Table Text Block] Tabular disclosure of the accrued product returns and rebates. Composition of Balance Sheet Items Supplemental Balance Sheet Disclosures [Text Block] Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Interest rate Debt Instrument, Interest Rate, Stated Percentage Optional lease renewal term (in years) Lessee, Operating Lease, Renewal Term Contingent consideration Contingent consideration Business Combination, Contingent Consideration, Liability Share-Based Payments Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Investments Equity Securities, FV-NI, Cost Convertible notes, net Carrying Value Total carrying value Convertible Notes Payable, Noncurrent Cash Cash [Member] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Measurement Frequency [Axis] Measurement Frequency [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Accrued expenses and other current liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Expenses And Other Current Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Accrued Expenses And Other Current Liabilities Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Navitor investment R&D expense (see Note 5) Research and Development in Process Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Basic (in shares) Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in dollars per share) Earnings per share, diluted (in dollars per share) Earnings Per Share, Diluted Effect of dilutive securities: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Amortization of deferred financing costs and debt discount Amortization of Debt Issuance Costs and Discounts Conversion rate of the notes on trading day (as percent) Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Net product sales Product [Member] Cash paid for income taxes Income Taxes Paid, Net Accounting Standards Update [Extensible Enumeration] Accounting Standards Update [Extensible Enumeration] Subsequent Events Subsequent Events [Text Block] Comprehensive earnings Comprehensive Income (Loss), Net of Tax, Attributable to Parent Intangible assets, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Deferred income tax liabilities Deferred Income Tax Liabilities, Net Conversion Circumstance One Conversion Circumstance One [Member] Conversion Circumstance One Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Summary of restricted stock units Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Corporate and municipal debt securities Corporate Debt Securities [Member] Schedule of reconciliation of income tax expense at the U.S Federal statutory income tax rate to the entity's effective income tax rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Fair Value of Financial Measurements Fair Value Disclosures [Text Block] Number of established marketed products Number Of Established Marketed Products Number Of Established Marketed Products Accounts payable Accounts Payable, Current Concentration Risk Type [Axis] Concentration Risk Type [Axis] Depreciation and amortization Depreciation, Depletion and Amortization 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Three Annual minimum purchase quantity requirement amount Purchase Commitment, Annual Minimum Amount Committed Purchase Commitment, Annual Minimum Amount Committed Accumulated Other Comprehensive Earnings (Loss) AOCI Attributable to Parent [Member] Inventories Increase (Decrease) in Inventories Accrued royalties Accrued Royalties, Current 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. Common stock shares outstanding (in shares) Common Stock, Shares, Outstanding Financial Instruments [Domain] Financial Instruments [Domain] Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Cost of goods sold Cost of Goods and Services Sold Revenues Revenues [Abstract] Other liabilities Other Sundry Liabilities, Noncurrent Software Computer Software, Intangible Asset [Member] Document Period End Date Document Period End Date Entity Central Index Key Entity Central Index Key Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Income per share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Consolidated Entities [Domain] Consolidated Entities [Domain] Schedule of property and equipment Property, Plant and Equipment [Table Text Block] Income Statement Location [Domain] Income Statement Location [Domain] Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] AmerisourceBergen Drug Corporation AmerisourceBergen Drug Corporation [Member] AmerisourceBergen Drug Corporation Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net 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. Other liabilities Total Other Liabilities, Noncurrent Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Notes payable Debt Instrument [Line Items] Debt Instrument [Line Items] Trading Symbol Trading Symbol Earnings Per Share [Abstract] Earnings Per Share [Abstract] Pro forma total revenues Business Acquisition, Pro Forma Revenue Property and equipment, gross Property, Plant and Equipment, Gross Current debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Strike price of the warrant transactions (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Vested and expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Outstanding at the beginning of the period (in dollars per share) Outstanding at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Costs and expenses Costs and Expenses [Abstract] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Total Share-based Payment Arrangement, Expense Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Entity Current Reporting Status Entity Current Reporting Status Earnings per share Earnings Per Share, Basic and Diluted [Abstract] 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] Total lease liabilities Lease, Liability Lease, Liability Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Sales and maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Greater than 4 years Available For Sale Securities Debt Maturities, Thereafter, Fair Value Available For Sale Securities Debt Maturities, Thereafter, Fair Value Total fair value of liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Construction in Progress Construction in Progress [Member] Performance-Based Units Performance Based Units [Member] Performance Based Units Cash and cash equivalents at beginning of year Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Deferred income tax liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Assumed Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Assumed Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Impairment due to credit losses Debt Securities, Available-for-sale, Allowance for Credit Loss Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current assets Assets, Current [Abstract] Carrying Amount, Gross Finite-Lived Intangible Assets, Gross Leases [Abstract] Leases [Abstract] Remaining Weighted Average Life (Years) Finite-Lived Intangible Assets, Remaining Amortization Period Cash and Money market funds Cash and Cash Equivalents, Fair Value Disclosure Entity Address, Postal Zip Code Entity Address, Postal Zip Code Interest expense on nonrecourse liability related to sale of future royalties Interest Expense, Other Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Diluted (in shares) Weighted average shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Conversion of debt to equity Debt Conversion, Original Debt, Amount Adamas Acquisition Adamas [Member] Adamas Recurring Fair Value, Recurring [Member] Income Tax (Benefit) Expense Income Tax Disclosure [Text Block] Nonrecourse liability related to sale of future royalties, long term Non Recourse Debt Sale of Future Royalties Noncurrent Noncurrent portion of debt, net of the amount due within one year or the normal operating cycle, if longer, related to the sale of future royalties, for which the creditor does not have general recourse to the debtor but rather has recourse only to the property used for collateral in the transaction or other specific property. Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Summary of stock options and SAR activities Share-based Payment Arrangement, Option, Activity [Table Text Block] Schedule of common stock equivalents excluded in the calculation of diluted earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Five Oxtellar XR Oxtellar X R [Member] Represents information pertaining to Oxtellar XR product. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Indefinite-lived Intangible Assets [Line Items] Indefinite-lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Royalty revenues Royalty [Member] Entity Address, Address Line One Entity Address, Address Line One Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Navitor Pharmaceuticals, Inc. Navitor Pharmaceuticals, Inc. [Member] Navitor Pharmaceuticals, Inc. Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Unrealized loss on marketable securities, net of tax Unrealized loss on marketable securities, net of tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent GOCOVRI GOCOVRI [Member] GOCOVRI Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] 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 Future Sales Performance SPN-830 Future Sales Performance [Member] SPN-830 Future Sales Performance Consolidation Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Spend commitment amount Purchase Commitment, Remaining Minimum Amount Committed Total current liabilities Liabilities, Current Cash consideration paid Cash consideration paid Payments to Acquire Businesses, Gross Qelbree Qelbree [Member] Qelbree Money market securities and funds Money Market Funds [Member] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Current Fiscal Year End Date Current Fiscal Year End Date Unamortized debt discount and deferred financing costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Statement [Table] Statement [Table] Advertising costs Advertising Expense Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Statistical Measurement [Axis] Statistical Measurement [Axis] Carrying Amount, Net Finite-Lived Intangible Assets, Net Goodwill Goodwill Balance as of December 31, 2021 Balance as of March 31, 2022 (unaudited) Goodwill Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Accounting Standards Update 2020-06 Accounting Standards Update 2020-06 [Member] Schedule of Goodwill Schedule of Goodwill [Table Text Block] Business Organization Nature of Operations [Text Block] Adjustments to reconcile net earnings to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Less than 1 year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Acquired developed technology and product rights Developed Technology Rights [Member] Computer equipment Computer Equipment [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] SPN-30 Regulatory and Commercial Activities SPN-830 Regulatory And Commercial Activities [Member] SPN-830 Regulatory And Commercial Activities Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Rights per share (in dollars per share) Business Combination, Contingent Consideration, Rights Per Share Business Combination, Contingent Consideration, Rights Per Share Non-cash royalty revenue Revenue From Royalty Agreement Represents revenue from the sale of certain royalty and milestone rights. Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Convertible Senior Notes Due 2023 Long-term Debt [Text Block] Deferred income tax benefit Deferred Income Tax Expense (Benefit) Vested and expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term