| Document And Entity Information - USD ($) $ in Millions | 12 Months Ended | ||
| Dec. 31, 2019 | Apr. 07, 2020 | Jun. 30, 2019 | |
| Document and Entity Information [Abstract] | |||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Document Period End Date | Dec. 31, 2019 | ||
| Entity File Number | 001-32360 | ||
| Entity Registrant Name | AKORN, INC | ||
| Entity Incorporation, State or Country Code | LA | ||
| Entity Tax Identification Number | 72-0717400 | ||
| Entity Address, Address Line One | 1925 W. Field Court | ||
| Entity Address, Address Line Two | Suite 300 | ||
| Entity Address, City or Town | Lake Forest | ||
| Entity Address, State or Province | IL | ||
| Entity Address, Postal Zip Code | 60045 | ||
| Local Phone Number | 279-6100 | ||
| City Area Code | 847 | ||
| Title of 12(b) Security | Common Stock, No Par Value | ||
| Trading Symbol | AKRX | ||
| Security Exchange Name | NASDAQ | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| Entity Shell Company | false | ||
| Entity Common Stock, Shares Outstanding | 132,990,343 | ||
| Entity Public Float | $ 497.2 | ||
| Amendment Description | This Amendment No. 1 on Form 10-K/A (the “Form 10-K/A”) is being filed by Akorn, Inc. (the “Company”) in order to disclose information required by Items 10, 11, 12, 13 and 14 of Part III, which was previously omitted in reliance on Instruction G to Form 10-K from its Annual Report on Form 10-K (the “Original Form 10-K”) for the year ended December 31, 2019, filed with the Securities and Exchange Commission (the “SEC”) on February 26, 2020. The Company is not filing its definitive proxy statement for its 2020 annual stockholder meeting within 120 days of the end of its most recent fiscal year as required under Instruction G to Form 10-K in order to incorporate information contained in the definitive proxy statement into the Original Form 10-K and list additional exhibits. This Form 10-K/A discloses such information. In connection with the filing of this Form 10-K/A and pursuant to the rules of the SEC, we are including with this Form 10-K/A certain other exhibits, including certifications with respect to this filing by our principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002; accordingly, Item 15 of Part IV has also been amended to reflect the filing of these new exhibits. Because no financial statements have been included in this Form 10-K/A and this Form 10-K/A does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. We are not including the certifications under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Form 10-K/A. This Form 10-K/A is limited in scope to the items identified above and should be read in conjunction with the Original Form 10-K and our other filings with the SEC. This Form 10-K/A does not reflect events occurring after the filing of the Original Form 10-K or modify or update those disclosures affected by subsequent events. Consequently, all other information is unchanged and reflects the disclosures made at the time of the filing of the Original Form 10-K. | ||
| Amendment Flag | true | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity Central Index Key | 0000003116 | ||
| Document Fiscal Year Focus | 2019 | ||
| Document Fiscal Period Focus | FY |
