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Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Rest of World Non-US [Member] Share exchange ratio Business Combination, Share Exchange Ratio Business Combination, Share Exchange Ratio Land and buildings Land and Building [Member] Equity Awards Adjustments Equity Awards Adjustments [Member] Convertible Senior Notes Due 2031, Over-Allotment Option Convertible Senior Notes Due 2031, Over-Allotment Option [Member] Convertible Senior Notes Due 2031, Over-Allotment Option Total liabilities and stockholders' deficit Liabilities and Equity Goodwill and other intangible assets, net Intangible Asset, Including Goodwill, after Accumulated Amortization Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Other current and noncurrent liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Purchases of investments in debt securities Payments to Acquire Held-to-Maturity Securities Purchases of in-process research and development and intangible assets Payments to Acquire Intangible Assets Debt Long-Term Debt [Text Block] Schedule of Accounts Payable and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Incremental shares for conversion of convertible debt included in diluted weighted-average shares outstanding (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Current tax receivable Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Number of pending claims Loss Contingency, Pending Claims, Number Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Restructuring Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Vesting percentage of target Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage of Target Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage of Target Name Measure Name Income Tax Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other adjustments, net Other Noncash Income (Expense) Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Phase I of the Indivior Action Agenda Indivior Action Agenda, Phase I [Member] Indivior Action Agenda, Phase I Name Trading Arrangement, Individual Name Compensation cost for unvested awards not recognized Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Unrealized loss on equity investments Equity Securities, FV-NI, Unrealized Gain (Loss) Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization Stockholders ownership percentage Stockholders, Ownership Percentage Stockholders, Ownership Percentage Percentage premium of conversion price over share price Debt Instrument, Convertible, Conversion Price, Premium Over Share Price, Percentage Debt Instrument, Convertible, Conversion Price, Premium Over Share Price, Percentage Current assets Assets, Current [Abstract] Supernus Stockholders Supernus Stockholders [Member] Supernus Stockholders Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense Income tax expense Total income tax expense Income Tax Expense (Benefit) Impact from foreign exchange movements Gain (Loss), Foreign Currency Transaction, before Tax Adjustments to reconcile net income to net cash from operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Cost of sales Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Forecast Forecast [Member] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Research and development Research and development Research and Development Expense (Excluding Acquired in Process Cost) Net income Net income Net income Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Interest (income) Interest (income) Investment Income, Interest Special Dividend [Domain] Special Dividend [Domain] Special Dividend [Domain] Share repurchase liability movement, net Share Repurchase Liability, Increase (Decrease) In Equity Share Repurchase Liability, Increase (Decrease) In Equity Termination fee Business Combination, Fee upon Termination of Agreement Business Combination, Fee upon Termination of Agreement Consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Number of new claims filed Loss Contingency, New Claims Filed, Number Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]