Commitments and Contingencies Disclosure [Abstract] Commitment Payment to Strategic Business Partners Commitment Payment to Strategic Business Partners [Table Text Block] Tabular disclosure of the entity's estimate of amount of payments due, following the date of the latest balance sheet, related to an agreement with strategic business partners. Segment Reporting [Abstract] Selected financial info by reportable segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Revenue from External Customers by Geographic Areas Revenue from External Customers by Geographic Areas [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Fair value per stock option (in Dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Forfeiture rate Forfeiture rate The forfeiture rate at which grantees could have acquired the underlying shares with respect to stock options that were terminated. Organization, Consolidation and Presentation of Financial Statements [Abstract] Number of reportable segments (in segment) Number of Reportable Segments Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Forecast Scenario, Forecast [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Merger of Akorn Inc. Merger Of Akorn Inc. [Member] Merger Of Akorn Inc. [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Fresenius Kabi AG Fresenius Kabi AG [Member] Fresenius Kabi AG [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Consideration given in cash per share (in Dollars per share) Business Acquisition, Share Price Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Other Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Segment Information Segment Reporting Disclosure [Text Block] Schedule of Indefinite-Lived Intangible Assets [Table] Schedule of Indefinite-Lived Intangible Assets [Table] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] IPR&D In Progress Research And Development [Member] Information on indefinite lived IPR&D. Indefinite-lived Intangible Assets Indefinite-lived Intangible Assets [Line Items] Gross Amount Indefinite-Lived Intangible Assets (Excluding Goodwill), Before Reclassifications And Impairment Indefinite-Lived Intangible Assets (Excluding Goodwill), Before Reclassifications And Impairment Reclassifications Indefinite-Lived Intangible Assets, Reclassification To (From) Indefinite-Lived Intangible Assets Indefinite-Lived Intangible Assets, Reclassification To (From) Indefinite-Lived Intangible Assets Gross Impairment, Indefinite-lived intangible assets Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Net Balance Indefinite-Lived Intangible Assets (Excluding Goodwill) Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Product licensing rights Licensing Agreements [Member] Trademarks Trademarks [Member] Customer relationships Customer Relationships [Member] Other intangibles Other Intangible Assets [Member] Finite-Lived Intangible Assets Finite-Lived Intangible Assets [Line Items] Gross Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Reclassifications Finite-Lived Intangible Assets, Reclassification To (From) Finite-Lived Intangible Assets Finite-Lived Intangible Assets, Reclassification To (From) Finite-Lived Intangible Assets Gross Impairment - Finite-lived intangible assets Impairment Of Intangible Assets And Reversal Of Accumulated Amortization, Finite-Lived Impairment Of Intangible Assets And Reversal Of Accumulated Amortization, Finite-Lived Net Balance Finite-Lived Intangible Assets, Net Wtd Avg Remaining Amortization Period (years) Finite-Lived Intangible Asset, Useful Life Gross Amount Intangible Assets, Gross (Excluding Goodwill) Gross Impairment Impairment Of Intangible Assets And Reversal Of Accumulated Amortization (Excluding Goodwill) Impairment Of Intangible Assets And Reversal Of Accumulated Amortization (Excluding Goodwill) Net Balance Intangible Assets, Net (Excluding Goodwill) Property, Plant and Equipment [Abstract] Property, Plant and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land and land improvements Land [Member] Buildings and leasehold improvements Building and Building Improvements [Member] Furniture and equipment Furniture and Fixtures [Member] Property, plant and equipment in service, net Property Plant And Equipment Placed In Service Net [Member] The net Property, Plant and Equipment Placed in Service Construction in progress Construction in Progress [Member] Property, Plant and Equipment, Net Property, Plant and Equipment [Line Items] Property, plant, and equipment, gross Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment, net Property, Plant and Equipment, Net Statement of Cash Flows [Abstract] OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Consolidated net (loss) income Net Income (Loss) Attributable to Parent Adjustments to reconcile consolidated net income to net cash (used in) provided by operating activities: Adjustments to reconcile consolidated net income to net cash provided by operating activities: Depreciation and amortization Depreciation, Depletion and Amortization Amortization of debt financing costs Amortization of Debt Issuance Costs and Discounts Impairment of intangible assets Asset Impairment Charges Non-cash stock compensation expense Share-based Compensation Deferred income taxes, net Increase (Decrease) in Deferred Income Taxes Other Other Operating Activities, Cash Flow Statement Changes in operating assets and liabilities: Changes in operating assets and liabilities: Trade accounts receivable Increase (Decrease) in Accounts Receivable Inventories, net Increase (Decrease) in Inventories Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Trade accounts payable Increase (Decrease) in Accounts Payable, Trade Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from disposal of assets Proceeds from Sale of Productive Assets Purchases of property, plant and equipment Payments to Acquire Property, Plant, and Equipment NET CASH USED IN INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from the exercise of stock options Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Payment of contingent acquisition liabilities Payment for Contingent Consideration Liability, Financing Activities Lease payments Payments For Operating Leases Payments For Operating Leases NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents, and restricted at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD SUPPLEMENTAL DISCLOSURES: SUPPLEMENTAL DISCLOSURES: Amount paid for interest Interest Paid Amount paid for income taxes, net Income Taxes Paid, Net Additional capital expenditures included in accounts payable Capital Expenditures Incurred but Not yet Paid Income Statement [Abstract] Revenues, net Revenue, Net Cost of sales (exclusive of amortization of intangibles, included within operating expenses below) Cost of Goods and Services Sold GROSS PROFIT Gross Profit Selling, general and administrative expenses Selling, General and Administrative Expense Acquisition-related costs Business Combination, Acquisition Related Costs Research and development expenses Research and Development Expense Amortization of intangibles Amortization of Intangible Assets Impairment of intangible assets Impairment of Intangible Assets (Excluding Goodwill) TOTAL OPERATING EXPENSES Operating Expenses OPERATING (LOSS) INCOME Operating Income (Loss) Amortization of deferred financing costs Amortization of Debt Issuance Costs Interest expense, net Interest Income (Expense), Nonoperating, Net Other non-operating income, net Other Nonoperating Income (Expense) (LOSS) INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax (benefit) provision Income Tax Expense (Benefit) CONSOLIDATED NET (LOSS) INCOME CONSOLIDATED NET (LOSS) INCOME PER SHARE NET INCOME (LOSS) PER SHARE: CONSOLIDATED NET (LOSS) INCOME PER SHARE, BASIC (in Dollars per share) Earnings Per Share, Basic CONSOLIDATED NET (LOSS) INCOME PER SHARE, DILUTED (in Dollars per share) Earnings Per Share, Diluted SHARES USED IN COMPUTING NET (LOSS) INCOME PER SHARE SHARES USED IN COMPUTING NET INCOME (LOSS) PER SHARE: BASIC (in Shares) Weighted Average Number of Shares Outstanding, Basic DILUTED (in Shares) Weighted Average Number of Shares Outstanding, Diluted COMPREHENSIVE (LOSS) INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Unrealized holding (loss) gain on available-for-sale securities, net of tax of $0 and $75 for the three months ended March 31, 2018 and 2017, respectively. Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation (loss) gain Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Pension liability adjustment net of tax of ($1) and $57 for the three months ended March 31, 2018 and 2017, respectively. Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent COMPREHENSIVE (LOSS) INCOME Comprehensive Income (Loss), Net of Tax, Attributable to Parent 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 [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock options Stock Options And Employee Stock Purchase Plan Espp [Member] Information on the stock option and employee stock purchase plan. Employee stock purchase plan Employee Stock [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation expense Allocated Share-based Compensation Expense Accounting Changes and Error Corrections [Abstract] Recently Issued and Adopted Accounting Pronouncements Description of New Accounting Pronouncements Not yet Adopted [Text Block] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Document Type Document Type Current Fiscal Year End Date Current Fiscal Year End Date Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Amendment Flag Amendment Flag Entity Central Index Key Entity Central Index Key Entity Filer Category Entity Filer Category Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Accounting Policies [Abstract] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Restrictions on Cash and Cash Equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Basis used to measure the fair value of financial instruments Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Income Tax Disclosure [Abstract] Change in tax rate, provisional Income tax expense (benefit) Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense (Benefit) Income tax provision (benefit) Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Valuation allowance Deferred Tax Assets, Valuation Allowance Unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefits that would impact the Company's effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefits that would impact goodwill Unrecognized Tax Benefits That Would Impact Goodwill Unrecognized Tax Benefits That Would Impact Goodwill Unrecognized tax benefits, income tax penalties expense Unrecognized Tax Benefits, Income Tax Penalties Expense Unrecognized tax benefits, interest on income taxes expense Unrecognized Tax Benefits, Interest on Income Taxes Expense Unrecognized tax benefits, income tax penalties accrued Unrecognized Tax Benefits, Income Tax Penalties Accrued Unrecognized tax benefits, interest on income taxes accrued Unrecognized Tax Benefits, Interest on Income Taxes Accrued Equity [Abstract] Share Repurchases Stockholders' Equity Note Disclosure [Text Block] Inventory Disclosure [Abstract] Inventories, Net Inventory Disclosure [Text Block] Risks and Uncertainties [Abstract] Concentration Risk [Table] Concentration Risk [Table] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Big 3 Wholesalers combined Big 3 Wholesalers [Member] Represents information related to the Big 3 Wholesalers. Amerisource Amerisource [Member] Represents the customer Amerisource. Cardinal Cardinal [Member] Represents the customer Cardinal. McKesson Mc Kesson [Member] Represents McKesson the customer. All Others Other Customers [Member] Other Customers [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Net Revenue Sales Revenue, Net [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Revenues, net Concentration risk percentage Concentration Risk, Percentage Payment terms period Contract with Customer, Payment Terms, Period Contract with Customer, Payment Terms, Duration Restricted cash Restricted Cash Chargeback provision Sales Chargebacks, Goods Sales Chargebacks, Goods Sales chargebacks as percentage of gross sales Sales Chargebacks, Goods, Percentage Of Gross Sales Sales Chargebacks, Goods, Percentage Of Gross Sales Gross sales Sales Revenue, Goods, Gross Change in ratio of direct to indirect sales for chargeback reserves used in sensitivity analysis Chargeback Reserve, Sensitivity Analysis, Assumptions, Direct To Indirect Sales Ratio Threshold Chargeback Reserve, Sensitivity Analysis, Assumptions, Direct To Indirect Sales Ratio Threshold Potential increase in chargeback expense based on sensitivity analysis Chargeback Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Increase Chargeback Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Increase Potential decrease in chargeback expense based on sensitivity analysis Chargeback Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Decrease Chargeback Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Decrease Rebates, administrative and other fees Sales Rebates, Goods Sales Rebates, Goods Rebates, administrative and other fees as a percentage of gross sales Sales Rebates, Goods, Percentage Of Gross Sales Sales Rebates, Goods, Percentage Of Gross Sales Change in ratio of direct to indirect sales for rebates, administrative and other fees used in sensitivity analysis Sales Rebates, Sensitivity Analysis, Assumptions, Direct To Indirect Sales Ratio Threshold Sales Rebates, Sensitivity Analysis, Assumptions, Direct To Indirect Sales Ratio Threshold Potential increase in rebates, administrative and other fees expense based on sensitivity analysis Sales Rebates Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Increase Sales Rebates Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Increase Potential decrease in rebates, administrative and other fees expense based on sensitivity analysis Sales Rebates Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Decrease Sales Rebates Expense, Sensitivity Analysis, Assumptions, Direct To Indirect Sales, Maximum Decrease Sales returns Sales Returns, Goods Change in ratio of direct to indirect sales for sales return reserve used in sensitivity analysis Sales Returns, Goods, Percentage Of Gross Sales Sales Returns, Goods, Percentage Of Gross Sales Change in lag time to process returns for sales returns reserve used in sensitivity analysis Sales Returns, Sensitivity Analysis, Assumptions, Change In Time To Process Return, Threshold Sales Returns, Sensitivity Analysis, Assumptions, Change In Time To Process Return, Threshold Potential decrease in sales returns expense based on sensitivity analysis Sales Returns Expense, Sensitivity Analysis, Assumptions, Change In Lag Time, Maximum Increase Sales Returns Expense, Sensitivity Analysis, Assumptions, Change In Lag Time, Maximum Increase Potential increase in sales returns expense based on sensitivity analysis Sales Returns Expense, Sensitivity Analysis, Assumptions, Change In Lag Time, Maximum Decrease Sales Returns Expense, Sensitivity Analysis, Assumptions, Change In Lag Time, Maximum Decrease Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Standard chargeback period Standard Chargeback Period Standard Chargeback Period Extended chargeback period Extended Chargeback Period Extended Chargeback Period Other Comprehensive Income (Loss), Tax Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosures [Abstract] Unrealized holding gain (loss) on available-for-sale securities, tax benefit (expense) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Pension liability adjustment, tax expense (benefit) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent Receivables [Abstract] Less adjustments for: Less adjustments for: Chargebacks Rebates, administrative and other fees Product returns Discounts and allowances Sales Discounts, Returns and Allowances, Goods Advertising, promotions and others Marketing and Advertising Expense Revenues, net Sales Revenue, Goods, Net Finished goods Inventory, Finished Goods, Gross Work in process Inventory, Work in Process, Gross Raw materials and supplies Inventory, Raw Materials and Supplies, Gross Inventories, net Inventory, Net Inventory valuation reserves Inventory Valuation Reserves Earnings Per Share [Abstract] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Foreign Non-US [Member] Property, plant and equipment, net Depreciation expense Depreciation Information about the Company's Income Tax Provision Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Prescription Pharmaceuticals Prescription Pharmaceuticals [Member] Prescription pharmaceuticals segment. Consumer Health Conusmer Health [Member] Consumer health segment. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenues, net: Revenues [Abstract] Gross Profit: Gross Profit [Abstract] Total gross profit Operating expenses Other expenses, net Nonoperating Income (Expense) Maximum stock repurchase program amount Stock Repurchase Program, Authorized Amount Stock repurchased during period (in Shares) Stock Repurchased During Period, Shares Average price per share of stock repurchased (in Dollars per share) Treasury Stock Acquired, Average Cost Per Share Remaining repurchase authorization Stock Repurchase Program, Remaining Authorized Repurchase Amount Cash and cash equivalents Cash Total cash, cash equivalents, and restricted cash Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Omnibus Plan Akorn, Inc. 2017 Omnibus Incentive Compensation Plan [Member] Akorn, Inc. 2017 Omnibus Incentive Compensation Plan [Member] 2014 Plan Two Thousand Fourteen Plan [Member] Information pertaining to the 2014 stock option plan. Two Thousand And Three Stock Option Plan Two Thousand And Three Stock Option Plan [Member] Information on the 2003 stock option plan. Employee Stock Purchase Plan ESPP Employee Stock Purchase Plan ESPP [Member] Represents the employee stock purchase plan. Contributions from plan participants through payroll deductions Share-Based Compensation Arrangement By Share-Based Payment Award, Cash Contributions To ESPP Share-Based Compensation Arrangement By Share-Based Payment Award, Cash Contributions To ESPP Number of shares reserved for issuance (in Shares) Common Stock, Capital Shares Reserved for Future Issuance Options outstanding (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Other than options, outstanding (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Number of unit granted (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number of options granted (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercise of stock options (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Proceeds from stock options exercised Proceeds from Stock Options Exercised Tax benefit from compensation expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Annual award vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Percentage of base wages withheld for purchase of stock Percentage of Base Wages Withheld for Purchase of Stock The percentage of base wages withheld for the purchase of stock under a share based compensation plan. Discount from market price at the beginning or end of the offering period Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date Number of offering periods Number of Offering Periods Number of Offering Periods Maximum annual purchase per employee under ESPP Annual Purchase Of Stock Per Employee Annual purchase of stock per employee under a share based compensation plan. Maximum annual withholdings per employee for purchases under ESPP Base Wages Subject To Withholding Towards Stock Purchase Base wages subject to withholding towards stock purchase under a share based compensation plan. Maximum number of shares available for purchase per employee (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee Employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Statement of Financial Position [Abstract] ASSETS Assets [Abstract] CURRENT ASSETS Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Trade accounts receivable, net Accounts Receivable, Net, Current Inventories, net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current TOTAL CURRENT ASSETS Assets, Current PROPERTY, PLANT AND EQUIPMENT, NET OTHER LONG-TERM ASSETS OTHER LONG-TERM ASSETS: Goodwill Goodwill Intangible assets, net Deferred tax assets Deferred Income Tax Assets, Net Other non-current assets Other Assets, Noncurrent TOTAL OTHER LONG-TERM ASSETS Assets, Noncurrent TOTAL ASSETS Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] CURRENT LIABILITIES Liabilities, Current [Abstract] Trade accounts payable Accounts Payable, Trade, Current Purchase consideration payable Business Combination, Contingent Consideration, Liability, Current Income taxes payable Taxes Payable, Current Accrued royalties Accrued Royalties, Current Accrued compensation Employee-related Liabilities, Current Accrued administrative fees Accrued Professional Fees, Current Accrued expenses and other liabilities Accrued Liabilities, Current TOTAL CURRENT LIABILITIES Liabilities, Current LONG-TERM LIABILITIES: LONG-TERM LIABILITIES: Long-term debt (net of non-current deferred financing costs) Long-term Debt, Excluding Current Maturities Deferred tax liability Deferred Income Tax Liabilities, Net Other long-term liabilities Other Liabilities, Noncurrent TOTAL LONG-TERM LIABILITIES Liabilities, Noncurrent TOTAL LIABILITIES Liabilities SHAREHOLDERS’ EQUITY Stockholders' Equity Attributable to Parent [Abstract] Common stock, no par value – 150,000,000 shares authorized; 125,258,615 and 125,090,522 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively Common Stock, Value, Issued Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax TOTAL SHAREHOLDERS’ EQUITY Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Research and Development Expense Research and Development Expense [Member] Intangible asset useful life Accumulated amortization Net impairment Number of marketed products Business Acquisitions, Number of Marketed Products Acquired Business Acquisitions, Number of Marketed Products Acquired Number of products abandoned Number Of I P R D Projects Abandoned Number of IPR&D projects abandoned based on analysis of launch expectations and technical feasibility. Impairment of intangible assets Schedules of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Number of customers considered as concentration risks Number of Customers Considered as Concentration Risks The number of customers considered as concentration risks during the period. Net Sales Segment Concentration Risk Segment Concentration Risk [Member] Segment Concentration Risk [Member] Product Concentration Risk Product Concentration Risk [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Ephedrine Sulfate Injection Ephedrine Sulfate Injection [Member] Ephedrine Sulfate Injection [Member] Concentration risk percentage Schedule of goodwill Schedule of Goodwill [Table Text Block] Schedule of other intangible assets Schedule of Intangible Assets and Goodwill [Table Text Block] Number of Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Non-vested shares, beginning balance (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in Shares) Vested (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested shares, ending balance (in Shares) Weighted Average Per Share Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average grant date fair value, beginning 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 Granted (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 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 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 grant date fair value, ending balance (in Dollars per share) Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Retained Earnings Retained Earnings [Member] Other Comprehensive Loss AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] BALANCES AT Dec. 31, 2017 (in Shares) Common Stock, Shares, Outstanding BALANCES AT Dec. 31, 2017 Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Compensation and share issuances related to restricted stock awards Stock Issued During Period, Value, Restricted Stock Award, Gross Stock-based compensation expense - stock options Stock Issued During Period, Value, Share-based Compensation, Gross Foreign currency translation loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Unrealized holding loss on available-for-sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Akorn AG pension liability adjustment Employee stock purchase plan (in Shares) Stock Issued During Period, Value, Employee Stock Purchase Plan BALANCES AT March 31, 2018 (in Shares) BALANCES AT March 31, 2018 (Loss) Earnings Per Share Earnings Per Share [Text Block] Accounts Receivable, Sales and Allowances Loans, Notes, Trade and Other Receivables Disclosure [Text Block] (Loss) Income before income taxes Income tax (benefit) provision as a percentage of (loss) income before income taxes Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Components of inventory Schedule of Inventory, Current [Table Text Block] Debt Disclosure [Abstract] Financing Arrangements Debt Disclosure [Text Block] Net (loss) income Net (loss) income per share: Earnings Per Share, Basic and Diluted [Abstract] Basic (in Dollars per share) Diluted (in Dollars per share) Shares used in computing net (loss) income per share: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted average basic shares outstanding (in Shares) Dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Stock option and unvested RSUs (in Shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Total dilutive securities (in Shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average diluted shares outstanding (in Shares) Shares subject to stock options omitted from the calculation of (loss) income per share as their effect would have been anti-dilutive (in Shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Measurements Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Items (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Nicox stock with lockup provisions Available-for-sale Securities Total assets Assets, Fair Value Disclosure Purchase consideration payable Commitments, Fair Value Disclosure Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Existing Term Loan Facility Term Loan Facility [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Eurodollar Spread Eurodollar [Member] ABR Spread Adjusted Prime And Federal Funds Rate [Member] Adjusted Prime And Federal Funds Rate [Member] Credit Rating, Moody's [Axis] Credit Rating, Moody's [Axis] External Credit Rating, Moody's [Domain] External Credit Rating, Moody's [Domain] Moody's, B1 Rating Moody's, B1 Rating [Member] Moody's, B2 Rating Moody's, B2 Rating [Member] Moody's, B3 Rating Moody's, B3 Rating [Member] Credit Rating, Standard & Poor's [Axis] Credit Rating, Standard & Poor's [Axis] External Credit Rating, Standard & Poor's [Domain] External Credit Rating, Standard & Poor's [Domain] Standard & Poor's, B Plus Rating or higher Standard & Poor's, B+ Rating [Member] Standard & Poor's, B Rating Standard & Poor's, B Rating [Member] Standard & Poor's, B Minus or lower Rating Standard & Poor's, B- Rating [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding, beginning balance (in Shares) Granted (in Shares) Exercised (in Shares) Forfeited (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options outstanding, ending balance (in Shares) Options, exercisable (in Shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted average exercise price, beginning balance (in Dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in Dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in Dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (in Dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Weighted average exercise price, ending balance (in Dollars per share) Weighted average exercise price, exercisable (in Dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Term, exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Polsinelli Polsinelli [Member] Polsinelli is a related party. Family member of the Company's Executive Vice President Immediate Family Member of Management or Principal Owner [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Legal services from Segal McCambridge Singer & Mahone Legal Services from Segal McCambridge Singer And Mahone [Member] Legal Services from Segal McCambridge Singer And Mahone [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Legal services obtained Related Party Transaction, Amounts of Transaction Accounts payable for legal services Accounts Payable, Related Parties Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Compensation, Activity Share-based Compensation, Activity [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Schedule of Variable Interest Rates Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Summary of the Activity in Goodwill by Segment Goodwill [Roll Forward] Balances at December 31, 2017 Currency translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Acquisitions Goodwill, Acquired During Period Impairments Goodwill, Impairment Loss Dispositions Goodwill, Written off Related to Sale of Business Unit Balances at March 31, 2018 Business and Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Common stock, no par value (in Dollars per share) Common Stock, No Par Value Common stock, shares authorized (in Shares) Common Stock, Shares Authorized Common stock, shares issued (in Shares) Common Stock, Shares, Issued Common stock, shares outstanding (in Shares) Contingent Potential Milestone Payments, Year ending December 31, Contractual Obligation, Fiscal Year Maturity [Abstract] 2018 Contractual Obligation, Future Minimum Payments Due, Remainder of Fiscal Year 2019 Contractual Obligation, Due in Second Year 2020 Contractual Obligation, Due in Third Year 2021 and Beyond Contractual Obligation, Due in Fourth Year Total Contractual Obligation Loss Contingencies [Table] Loss Contingencies [Table] Company's Insurers Company's Insurers [Member] Company's Insurers [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Fera Pharmaceuticals, LLC v. Akorn Inc. Fera Pharmaceuticals, LLC v. Akorn Inc. [Member] Fera Pharmaceuticals, LLC v. Akorn Inc. [Member] Yeung v. Akorn, Inc., et al. Yeung v. Akorn, Inc., et al. [Member] Yeung v. Akorn, Inc., et al. [Member] Yeung v. Akorn, Inc., et al. and Sarzynski v. Akorn, Inc., et al. Yeung v. Akorn, Inc., et al. and Sarzynski v. Akorn, Inc., et al. [Member] Yeung v. Akorn, Inc., et al. and Sarzynski v. Akorn, Inc., et al. Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of former employees Number Of Former Employees Number Of Former Employees Damages sought Loss Contingency, Damages Sought, Value Number of officers Number Of Officers Number Of Officers Lawsuits filed (in lawsuit) Loss Contingency, Number Of Lawsuits Loss Contingency, Number Of Lawsuits Litigation settlement, amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Payments for legal settlements Payments for Legal Settlements Income Taxes Income Tax Disclosure [Text Block] Maturities of Long-term Obligations Maturities of Long-term Debt and Capital Lease Obligations [Abstract] 2018 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2019 Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four Summary of net trade accounts receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of adjustments to gross sales Schedule of Principal Transactions Revenue [Table Text Block] Geographic Concentration Risk Geographic Concentration Risk [Member] Domestic UNITED STATES Gross accounts receivable Accounts Receivable, Gross, Current Less reserves for: Less reserves for: Chargebacks Chargeback Reserves, Goods Chargeback Reserves, Goods Rebates Rebate Reserve Rebate Reserve Product returns ReturnsReserve The returns reserve during the period related to trade receivables due to an Entity within one year (or the normal operating cycle, whichever is longer). Discounts and allowances DiscountAndAllowancesReserve The discount and allowances reserve during the period related to trade receivables due to an Entity within one year (or the normal operating cycle, whichever is longer). Advertising and promotions AdvertisingAndPromotionReserve The advertising and promotion reserve related to trade receivables due to an Entity within one year (or the normal operating cycle, whichever is longer). Doubtful accounts Allowance for Doubtful Accounts Receivable, Current Trade accounts receivable, net Customer, Supplier and Product Concentration Concentration Risk Disclosure [Text Block] Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Going Concern Substantial Doubt And Going Concern [Policy Text Block] Substantial Doubt And Going Concern [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Freight Shipping and Handling Cost, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Accounts Receivable Trade and Other Accounts Receivable, Policy [Policy Text Block] Chargebacks; Rebates, Administrative Fees and Others; Sales Returns Revenue Recognition, Revenue Reductions [Policy Text Block] Allowance for Coupons, Advertising, Promotions and Co-Pay discount cards Revenue Recognition Coupons [Policy Text Block] Disclosure of accounting policy for sales coupons. Doubtful Accounts Doubtful Accounts [Policy Text Block] Disclosure of accounting policy for doubtful accounts related to accounts receivable. Inventories Inventory, Policy [Policy Text Block] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Intangible Assets Intangible Assets, Finite-Lived, Policy [Policy Text Block] Net (loss) Income Per Common Share Earnings Per Share, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Recently Issued and Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Stock Options, Restricted Stock Units and Employee Stock Purchase Plan Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Property, plant and equipment Property, Plant and Equipment [Table Text Block] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term Loan Facility JPM Revolving Facility JPM Revolving Facility [Member] Represents the revolving credit facility from JP Morgan. Number of debt instruments Number Of Debt Instruments Number Of Debt Instruments Aggregate principal amount Debt Instrument, Face Amount Amount outstanding Long-term Line of Credit Amortization of deferred financing costs Unamortized deferred financing costs Debt Issuance Costs, Net Debt interest expense Interest Expense, Debt Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Remaining availability under credit facility Line of Credit Facility, Remaining Borrowing Capacity Trade Accounts Receivable Accounts Receivable [Member] Percentage of gross sales Gross Sales [Member] Gross revenue during the period from sale of goods in the normal course of business, before deducting returns, allowances and discounts.