Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Agreement termination notice period Variable Interest Entity, Agreement Termination Notice, Period Variable Interest Entity, Agreement Termination Notice, Period Restatement [Axis] Revision of Prior Period [Axis] Document Type Document Type Interest and other income, net Other Nonoperating Income (Expense) Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] 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] 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. 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 Acquired IPR&D In Process Research and Development [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Spend commitment amount, current period Purchase Commitment, Remaining Minimum Amount Committed, Due In Next Three Months Purchase Commitment, Remaining Minimum Amount Committed, Due In Next Three Months Goodwill Goodwill, Purchase Accounting Adjustments Sales and maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities APOKYN And SPN-830 APOKYN And SPN-830 [Member] APOKYN And SPN-830 Statistical Measurement [Domain] Statistical Measurement [Domain] Liabilities and stockholders’ equity Liabilities and Equity [Abstract] Share-Based Payments Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Deferred income tax liabilities Deferred Income Tax Liabilities, Net Security Exchange Name Security Exchange Name Intangible assets, net Total intangible assets, net Intangible Assets, Net (Excluding Goodwill) Finance lease assets Finance Lease, Right-of-Use Asset, before Accumulated Amortization Operating earnings Operating Income (Loss) Total current liabilities Liabilities, Current Total PSUs Performance Shares [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current 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 Accrued professional fees Accrued Professional Fees, Current Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Long term marketable securities Debt Securities, Available-for-sale, Noncurrent Assets Assets [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Investment, Name [Axis] Investment, Name [Axis] Accounting Policies [Abstract] Accounting Policies [Abstract] Convertible notes, net Total carrying value Convertible Notes Payable, Noncurrent Entity Address, State or Province Entity Address, State or Province Vested (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Accounts payable Accounts Payable, Current 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. Cash paid for operating leases Operating Lease, Payments Conversion Circumstance Two Conversion Circumstance Two [Member] Conversion Circumstance Two Convertible Notes Convertible Notes Payable [Member] Finance lease liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finance Lease, Liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finance Lease, Liability Retained earnings Retained Earnings (Accumulated Deficit) Operating lease assets Operating Lease, Right-of-Use Asset Remaining Weighted- Average Life (Years) Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 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 SPN-830 First Commercial And Sale SPN-830 First Commercial And Sale [Member] SPN-830 First Commercial And Sale Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Product Concentration Risk Product Concentration Risk [Member] Summary of liability component of 2023 Notes Convertible Debt [Table Text Block] 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 Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Customer [Axis] Customer [Axis] Balance (in shares) Balance (in shares) Shares, Outstanding Additional payable to seller Payments to Acquire Businesses, Net of Cash Acquired, Additional Payable Payments to Acquire Businesses, Net of Cash Acquired, Additional Payable Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Interest expense on nonrecourse liability related to sale of future royalties Interest Expense, Other Other comprehensive earnings Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other liabilities Total Other Liabilities, Noncurrent Marketable securities Marketable Securities, Current Cash consideration Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Consideration Transferred Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Consideration Transferred Work in process Inventory, Work in Process, Net of Reserves Share-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Inventories, net Total inventories Inventory, Net Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Measurement Frequency [Domain] Measurement Frequency [Domain] Advertising costs Advertising Expense Inventory [Line Items] Inventory [Line Items] Concentration risk percentage (more than) Concentration Risk, Percentage Business Acquisition [Axis] Business Acquisition [Axis] Accrued product returns Accrued Product Returns Represents the amount of accrued product returns. Conversion rate for the notes (in shares per $1,000 principal amount) Debt Instrument, Convertible, Conversion Ratio Inventory [Axis] Inventory [Axis] Statement [Line Items] Statement Statement [Line Items] 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] Earnings per share Earnings Per Share, Basic and Diluted [Abstract] Computer equipment Computer Equipment [Member] Prepaid expenses and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Contingent consideration, long term Business Combination, Contingent Consideration, Liability, Noncurrent Statement [Table] Statement [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Payment for option issue fee Collaborative Arrangement, Payment For Option Issue Fee Collaborative Arrangement, Payment For Option Issue Fee Strike price of the warrant transactions (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Business Combinations [Abstract] Entity Small Business Entity Small Business Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Selling, general and administrative Selling, General and Administrative Expenses [Member] 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. Amendment Flag Amendment Flag Schedule of computation of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Accrued clinical trial costs Accrued Clinical Trial and Clinical Supply Costs Current Represents the amount of clinical trial and clinical supply costs accrued. Weighted-average shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Product Candidates Product Candidates [Member] Product Candidates Balance at December 31, 2020 Balance at March 31, 2021 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Contingent Consideration Type [Domain] Contingent Consideration Type [Domain] Lease liabilities, current Lease Liabilities, Current [Abstract] Lease Liabilities, Current Leases Lessee, Finance Leases [Text Block] Schedule of recognized identified assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Other accrued expenses Other Accrued Liabilities, Current Spend commitment amount Purchase Commitment, Remaining Minimum Amount Committed Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Composition of Balance Sheet Items Supplemental Balance Sheet Disclosures [Text Block] APOKYN APOKYN [Member] APOKYN Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Entity Central Index Key Entity Central Index Key Measurement Frequency [Axis] Measurement Frequency [Axis] Software Computer Software, Intangible Asset [Member] Marketable securities Debt Securities, Available-for-sale, Current Financial Instruments [Domain] Financial Instruments [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Subsequent Events Subsequent Events [Text Block] Amortized cost Debt Securities, Available-for-sale, Amortized Cost Optional lease renewal term (in years) Lessee, Operating Lease, Renewal Term Gross unrealized gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Pro forma net earnings Business Acquisition, Pro Forma Net Income (Loss) Cash consideration to Seller - net of cash acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred, Cash Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred, Cash Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Summary of restricted stock units Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Income Statement Location [Axis] Income Statement Location [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Income Statement Location [Domain] Income Statement Location [Domain] Cash Cash [Member] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Schedule of unrestricted available-for-sale marketable securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Selling, general and administrative Selling, General and Administrative Expense Amortization of intangible assets Amortization of Intangible Assets Accrued product rebates Accrued Rebates Represents the amount of accrued rebates. SPN-830 NDA Approval Milestone SPN-830 NDA Approval Milestone [Member] SPN-830 NDA Approval Milestone Other assets Other Assets, Noncurrent Conversion rate of the notes on trading day (as percent) Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Issuance of common stock in connection with the Company’s equity award plans Stock Issued During Period, Value, New Issues Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Long term marketable securities Marketable Securities, Noncurrent Concentration Risk [Table] Concentration Risk [Table] Total assets Assets Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Interest expense Interest Expense, Debt 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 MDD US Enterprises LLC (Formerly USWM Enterprises) MDD US Enterprises LLC (Formerly USWM Enterprises) [Member] MDD US Enterprises LLC (Formerly USWM Enterprises) Title of 12(b) Security Title of 12(b) Security Common stock issued upon conversion of notes (in shares) Debt Conversion, Converted Instrument, Shares Issued Income taxes payable Accrued Income Taxes, Current Marketable securities - restricted (SERP) Assets for Plan Benefits, Defined Benefit Plan Antidilutive Securities [Axis] Antidilutive Securities [Axis] Investments Equity Securities, FV-NI, Cost Investments, Debt and Equity Securities [Abstract] Market-Based Units Market Based Units [Member] Market Based Units As Initially Reported Previously Reported [Member] Interest expense Total Interest Expense Depreciation and amortization Depreciation, Depletion and Amortization Revenue Recognition Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Summary of performance stock unit Share-based Payment Arrangement, Performance Shares, Activity [Table Text Block] Product and Service [Axis] Product and Service [Axis] Inventories (1) Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory Total liabilities Liabilities 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. Amortization of premium/discount on marketable securities Investment Income, Net, Amortization of Discount and Premium Lease liabilities, long term Lease Liabilities, Noncurrent [Abstract] Lease Liabilities, Noncurrent 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 Interest Expense Other Nonoperating Income and Expense [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Net earnings Net Income (Loss) Available to Common Stockholders, Basic Level 1 Fair Value, Inputs, Level 1 [Member] Accrued product costs Accrued Product Costs, Current Accrued Product Costs, Current Inventories Increase (Decrease) in Inventories Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Realized gains from sales of marketable securities Marketable Securities, Realized Gain (Loss), Excluding Other-than-temporary Impairment Loss 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 Accrued product returns and rebates Increase (Decrease) In Accrued Product Returns And Rebates Amount of increase (decrease) in product returns and rebates. SPN-830 FDA Acceptance Milestone SPN-830 FDA Acceptance Milestone [Member] SPN-830 FDA Acceptance Milestone Additional  Paid-in Capital Additional Paid-in Capital [Member] MYOBLOC MYOBLOC [Member] MYOBLOC Raw materials Inventory, Work in Process and Raw Materials, Net of Reserves Purchase price consideration Schedule of Business Acquisitions, by Acquisition [Table Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Deferred income tax liabilities, net 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 Contingent Consideration by Type [Axis] Contingent Consideration by Type [Axis] 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] 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 Common stock shares outstanding (in shares) Common Stock, Shares, Outstanding Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Fair value (Level 2) Convertible Debt, Fair Value Disclosures Earnings before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Research and development Research and Development Expense Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] 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 Royalty revenues Royalty [Member] Cash consideration to Seller - net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Common stock shares authorized (in shares) Common Stock, Shares Authorized Concentration Risk Type [Axis] Concentration Risk Type [Axis] Property and equipment, gross Property, Plant and Equipment, Gross Stock options, RSU and SAR (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Deferred income tax liabilities, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Income Tax Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Income Tax Liabilities 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 Income Statement [Abstract] Income Statement [Abstract] Accumulated Other Comprehensive Earnings (Loss) AOCI Attributable to Parent [Member] Schedule of contractual maturities of the unrestricted available-for-sale marketable securities held Investments Classified by Contractual Maturity Date [Table Text Block] Operating lease liabilities, long term Operating lease liabilities, long term Operating Lease, Liability, Noncurrent Accrued royalties Accrued Royalties, Current Unamortized debt discount and deferred financing costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Use of Estimates Use of Estimates, Policy [Policy Text Block] 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. Current assets Assets, Current [Abstract] Debt Conversion, Name [Domain] Debt Conversion, Name [Domain] Consolidated Entities [Axis] Consolidated Entities [Axis] Comprehensive earnings Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total lease assets Lease, Right-Of-Use Asset Lease, Right-Of-Use Asset Capitalized patent defense costs Patent Defense Costs [Member] Represents information concerning the capitalized patent defense costs related to the Watson litigation. 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] Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Legal Entity [Axis] Legal Entity [Axis] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment City Area Code City Area Code 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. Document Period End Date Document Period End Date Convertible Senior Notes Due 2023 Long-term Debt [Text Block] Contingent consideration Business Combination, Contingent Consideration, Liability Goodwill and Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Summary of disaggregation of revenues by nature Disaggregation of Revenue [Table Text Block] Finance lease asset Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finance Lease, Right-of-Use Asset Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finance Lease, Right-of-Use Asset Schedule of fair value of the financial assets and liabilities Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Schedule of inventories Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Share-based compensation expense Share-based Payment Arrangement, Noncash Expense Entity [Domain] Entity [Domain] 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 Measurement Period Adjustments Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract] Cover page. Cover [Abstract] Commitment period Long-term Purchase Commitment, Period Total identifiable net assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets (Liabilities), Net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets (Liabilities), Net Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Leases Lessee, Operating Leases [Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Trokendi XR Trokendi Xr [Member] Represents information pertaining to Trokendi XR patent litigation. Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Cost of goods sold Cost of Goods and Services Sold Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Total fair value Total Debt Securities, Available-for-sale Debt Conversion Description [Axis] Debt Conversion Description [Axis] Total costs and expenses Costs and Expenses Equity Components [Axis] Equity Components [Axis] Finished goods Inventory, Finished Goods, Net of Reserves Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Minimum Minimum [Member] Property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Consolidated Entities [Domain] Consolidated Entities [Domain] Operating lease liabilities, current portion Operating Lease, Liability, Current 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 Weighted- Average Remaining Contractual Term (in years) Share Based Compensation Arrangement by Share Based Payment Award Options Weighted Average Remaining Contractual Term [Abstract] Entity Interactive Data Current Entity Interactive Data Current Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Revenues Revenues [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Summary of stock options and SAR activities Share-based Payment Arrangement, Option, Activity [Table Text Block] Accounts Receivable Accounts Receivable [Member] VIE, qualitative or quantitative information, ownership percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Intangible assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Customer [Domain] Customer [Domain] Payment to resolve U.S. Department of Justice allegations Litigation Settlement, Amount Awarded to Other Party Entity Registrant Name Entity Registrant Name Business Acquisition [Line Items] Business Acquisition [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Concentration of Credit Risk Concentration Risk [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Estimated fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High Advertising Expense Advertising Cost [Policy Text Block] Weighted- Average Exercise Price (per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Three Major Customers Three Major Customers [Member] Three Major Customers Contingent consideration expense Other noncash adjustments, net Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Other income (expense) Other Nonoperating Income (Expense) [Abstract] Effect of dilutive securities: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Research and development Research and Development Expense [Member] Other liabilities Other Liabilities [Table Text Block] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction XADAGO XADAGO [Member] XADAGO Threshold trading days (whether or not consecutive) Debt Instrument, Convertible, Threshold Trading Days Lab equipment and furniture Lab Equipment And Furniture [Member] Represents information pertaining to lab equipment and furniture. Gross unrealized losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Lease assets and tenant receivable obtained for new 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 Entity Address, Postal Zip Code Entity Address, Postal Zip Code Long term marketable securities Debt Securities, Noncurrent [Abstract] Goodwill Goodwill Goodwill Less than 1 year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Document Transition Report Document Transition Report Contingent consideration, current portion Business Combination, Contingent Consideration, Liability, Current Schedule of property and equipment Schedule of Property Plant and Equipment Components [Table Text Block] Tabular disclosure of the components of property, plant and equipment. Share-based payments Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Warrants issued (in shares) Class of Warrant or Right, Outstanding Total fair value of assets acquired Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Assets Principal amount of debt 2023 Notes Debt Instrument, Face Amount Level 2 Fair Value, Inputs, Level 2 [Member] Document Quarterly Report Document Quarterly Report Liabilities: Liabilities, Fair Value Disclosure [Abstract] Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period 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. Total assets at fair value Total assets at fair value Assets, Fair Value Disclosure Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] 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. Schedule of Intangible Assets and Goodwill Schedule of Intangible Assets and Goodwill [Table Text Block] Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Customer Concentration Risk Customer Concentration Risk [Member] Vested and expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Conversion price, per share of common stock (in dollars per share) Debt Instrument, Convertible, Conversion Price Diluted (in shares) Weighted average shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic (in dollars per share) Earnings per share, basic (in dollars per share) Earnings Per Share, Basic Other Income and Expenses [Abstract] Other Income and Expenses [Abstract] Number of operating segments Number of Operating Segments Entity File Number Entity File Number Forfeited (in shares) Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Debt Disclosure [Abstract] Debt Disclosure [Abstract] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Inventory, Current [Table] Inventory, Current [Table] Long-term Purchase Commitment [Line Items] Long-term Purchase Commitment [Line Items] Amortization of deferred financing costs and debt discount Amortization of Debt Issuance Costs and Discounts Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Total Share-based Payment Arrangement, Expense 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. Common stock, $0.001 par value; 130,000,000 shares authorized; 52,994,137 and 52,868,482 shares issued and outstanding as of March 31, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Intangible assets: Finite-Lived Intangible Assets [Line Items] Document Fiscal Year Focus Document Fiscal Year Focus Total fair value of liabilities assumed Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Entity Current Reporting Status Entity Current Reporting Status Change in fair value recognized in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings 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 Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Total identifiable net assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 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 Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock shares issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable Increase (Decrease) in Accounts Receivable Notes payable Debt Instrument [Line Items] Debt Instrument [Line Items] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total stockholders’ equity Balance Balance Stockholders' Equity Attributable to Parent Business Organization Nature of Operations [Text Block] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Estimated fair value of contingent consideration Business Combination, Consideration Transferred Total liabilities and stockholders’ equity Liabilities and Equity Conversion Circumstance One Conversion Circumstance One [Member] Conversion Circumstance One Impairment due to credit losses Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded Accumulated other comprehensive earnings, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Income Tax Expense Income Tax Disclosure [Text Block] Entity Address, City or Town Entity Address, City or Town Accrued compensation Employee-related Liabilities, Current Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Deferred legal fees Payments to Acquire Intangible Assets RSUs Restricted Stock Units (RSUs) [Member] Total purchase price (4) Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Other noncurrent assets Other Assets, Noncurrent [Abstract] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Total purchase price (4) Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Total fair value of liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Financial Instrument [Axis] Financial Instrument [Axis] Common stock equivalents excluded in the calculation of diluted income per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Annual minimum purchase quantity requirement amount Purchase Commitment, Annual Minimum Amount Committed Purchase Commitment, Annual Minimum Amount Committed Other noncash adjustments, net Other Noncash Income (Expense) Net product sales Product [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Estimated Useful Lives as of Closing Date (in years) Finite-Lived Intangible Asset, Useful Life Equity Component [Domain] Equity Component [Domain] 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. Navitor investment R&D expense Research and Development in Process Liabilities Liabilities [Abstract] Property and equipment, net Property, Plant and Equipment, Net Entity Tax Identification Number Entity Tax Identification Number Share-Based Payments Share-based Payment Arrangement [Text Block] Net earnings Net earnings Net Income (Loss) Attributable to Parent Finance lease liability, long term Finance Lease, Liability, Noncurrent Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Other current liabilities Other Liabilities, Current Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Investment, Name [Domain] Investment, Name [Domain] Leases [Abstract] Leases [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total current assets Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Earnings Per Share [Abstract] Earnings Per Share [Abstract] Conversion of debt to equity Debt Conversion, Original Debt, Amount Income per share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Total property and equipment, gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization 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. Stockholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Estimated Fair Value Fair value of intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Acquired developed technology and product rights Developed Technology Rights [Member] Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Document Fiscal Period Focus Document Fiscal Period Focus Less accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Convertible note hedge options issued (in shares) Debt Conversion, Converted Instrument, Warrants or Options Issued Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Other liabilities Other Sundry Liabilities, Noncurrent Entity Filer Category Entity Filer Category Schedule of share-based compensation expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Common Stock Common Stock [Member] Property and equipment Property, Plant and Equipment [Line Items] Product and Service [Domain] Product and Service [Domain] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Conversion option stock price trigger (in dollars per share) Debt Instrument, Convertible, Stock Price Trigger Inventory [Domain] Inventory [Domain] Convertible Debt Convertible Debt [Member] Total lease liabilities Lease, Liability Lease, Liability Issuance of common stock in connection with the Company’s equity award plans (in shares) Stock Issued During Period, Shares, New Issues Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Abstract] Leasehold improvements Leasehold Improvements [Member] Intangible assets subject to amortization Finite-Lived Intangible Assets, Gross Additional cash payments upon milestone achievements minimum Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low Restatement [Domain] Revision of Prior Period [Domain] Interest rate Debt Instrument, Interest Rate, Stated Percentage Money market funds Money Market Funds [Member] Greater than 4 years Available For Sale Securities Debt Maturities, Thereafter, Fair Value Available For Sale Securities Debt Maturities, Thereafter, Fair Value Performance-Based Units Performance Based Units [Member] Performance Based Units Noncash investing and financing activities Noncash Investing and Financing Items [Abstract] Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect USWM Acquisition Business Combination Disclosure [Text Block] Total other income (expense) Nonoperating Income (Expense) Finance lease asset Finance Lease, Right-of-Use Asset, after Accumulated Amortization Stock options, RSUs Share-based Payment Arrangement, Option [Member] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Basic (in shares) Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Costs and expenses Costs and Expenses [Abstract] Subsequent Events [Abstract] Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Marketable securities Debt Securities, Current [Abstract] 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. Disaggregated Revenues Revenue from Contract with Customer [Text Block] Cash paid for interest on convertible notes Interest Paid, Excluding Capitalized Interest, Operating Activities Oxtellar XR Oxtellar X R [Member] Represents information pertaining to Oxtellar XR product. Additional paid-in capital Additional Paid in Capital Income tax expense Income Tax Expense (Benefit) Cash paid for income taxes Income Taxes Paid, Net 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 Purchases of marketable securities Payments to Acquire Marketable Securities Total Accrued Liabilities, Current Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Total liabilities at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Navitor Pharmaceuticals, Inc. Navitor Pharmaceuticals, Inc. [Member] Navitor Pharmaceuticals, Inc. Diluted (in dollars per share) Earnings per share, diluted (in dollars per share) Earnings Per Share, Diluted Finance lease liability, current portion Finance Lease, Liability, Current Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Local Phone Number Local Phone Number Cash consideration Payments to Acquire Businesses, Gross Business acquisition, pro forma information Business Acquisition, Pro Forma Information [Table Text Block] SPN-830 Future Sales Performance SPN-830 Future Sales Performance [Member] SPN-830 Future Sales Performance 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] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Entity Address, Address Line One Entity Address, Address Line One Entity Emerging Growth Company Entity Emerging Growth Company Acquired IPR&D Indefinite-lived Intangible Assets (Excluding Goodwill) Consecutive trading day period (in days) Debt Instrument, Convertible, Threshold Consecutive Trading Days Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Additional cash payments upon milestone achievements maximum Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Pro forma total revenues Business Acquisition, Pro Forma Revenue Deferred income tax provision Deferred Income Tax Expense (Benefit) Award Type [Axis] Award Type [Axis] 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] Less accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Maximum Maximum [Member] Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Retained Earnings Retained Earnings [Member] Schedule of interest expense Interest Income and Interest Expense Disclosure [Table Text Block] Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Fair value of financial instruments Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Outstanding at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Domain] Award Type [Domain] Corporate debt securities Corporate Debt Securities [Member] Trading Symbol Trading Symbol Exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Earnings per Share Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Current liabilities Liabilities, Current [Abstract] SPN-830 Regulatory And Commercial Activities SPN-830 Regulatory And Commercial Activities [Member] SPN-830 Regulatory And Commercial Activities Entity Shell Company Entity Shell Company Recurring Fair Value, Recurring [Member] 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 Non-cash royalty revenue Revenue From Royalty Agreement Represents revenue from the sale of certain royalty and milestone rights. Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]