Condensed Consolidated Statements of Shareholders' (Deficit) Equity - USD ($) $ in Thousands	Total	Common Stock	(Accumulated Deficit)	Other Comprehensive (Loss)
BEGINNING BALANCES (In Shares) at Dec. 31, 2018		125,492,000
BEGINNING BALANCES at Dec. 31, 2018	$ 443,866	$ 574,553	$ (107,168)	$ (23,519)
Increase (Decrease) in Stockholders' Equity
Consolidated net (loss)	(193,780)		(193,780)
Compensation and share issuances related to restricted stock awards (in Shares)		704,000
Compensation and share issuances related to restricted stock awards	6,989	$ 6,989
Stock-based compensation expense - stock options	2,821	$ 2,821
Foreign currency translation gain	956			956
Stock compensation plan withholdings for employee taxes (in Shares)		(88,000)
Stock compensation plan withholdings for employee taxes	(269)	$ (269)
Unrealized holding gain (loss) on available-for-sale securities	(3)			(3)
Akorn AG pension liability adjustment	74			74
Employee stock purchase plan expense	498	$ 498
ENDING BALANCES (In Shares) at Jun. 30, 2019		126,108,000
ENDING BALANCES at Jun. 30, 2019	261,152	$ 584,592	(300,948)	(22,492)
BEGINNING BALANCES (In Shares) at Mar. 31, 2019		125,579,000
BEGINNING BALANCES at Mar. 31, 2019	365,749	$ 579,157	(189,349)	(24,059)
Increase (Decrease) in Stockholders' Equity
Consolidated net (loss)	(111,599)		(111,599)
Compensation and share issuances related to restricted stock awards (in Shares)		583,000
Compensation and share issuances related to restricted stock awards	3,879	$ 3,879
Stock-based compensation expense - stock options	1,440	$ 1,440
Foreign currency translation gain	1,380			1,380
Stock compensation plan withholdings for employee taxes (in Shares)		(54,000)
Stock compensation plan withholdings for employee taxes	(153)	$ (153)
Unrealized holding gain (loss) on available-for-sale securities	(3)			(3)
Akorn AG pension liability adjustment	190			190
Employee stock purchase plan expense	269	$ 269
ENDING BALANCES (In Shares) at Jun. 30, 2019		126,108,000
ENDING BALANCES at Jun. 30, 2019	$ 261,152	$ 584,592	(300,948)	(22,492)
BEGINNING BALANCES (In Shares) at Dec. 31, 2019	126,145,832	126,146,000
BEGINNING BALANCES at Dec. 31, 2019	$ 234,292	$ 595,521	(333,938)	(27,291)
Increase (Decrease) in Stockholders' Equity
Consolidated net (loss)	(325,389)		(325,389)
Litigation shares issued (in Shares)		6,714,000
Litigation shares issued	4,364	$ 4,364
Compensation and share issuances related to restricted stock awards (in Shares)		688,000
Compensation and share issuances related to restricted stock awards	6,176	$ 6,176
Stock-based compensation expense - stock options	1,602	$ 1,602
Foreign currency translation gain	122			122
Stock compensation plan withholdings for employee taxes (in Shares)		(140,000)
Stock compensation plan withholdings for employee taxes	(98)	$ (98)
Unrealized holding gain (loss) on available-for-sale securities	3	$ 0		3
Akorn AG pension liability adjustment	$ 229			229
ENDING BALANCES (In Shares) at Jun. 30, 2020	133,407,696	133,408,000
ENDING BALANCES at Jun. 30, 2020	$ (78,699)	$ 607,565	(659,327)	(26,937)
BEGINNING BALANCES (In Shares) at Mar. 31, 2020		126,276,000
BEGINNING BALANCES at Mar. 31, 2020	(19,494)	$ 598,873	(590,665)	(27,702)
Increase (Decrease) in Stockholders' Equity
Consolidated net (loss)	(68,662)		(68,662)
Litigation shares issued (in Shares)		6,714,000
Litigation shares issued	4,364	$ 4,364
Compensation and share issuances related to restricted stock awards (in Shares)		492,000
Compensation and share issuances related to restricted stock awards	3,570	$ 3,570
Stock-based compensation expense - stock options	777	$ 777
Foreign currency translation gain	646			646
Stock compensation plan withholdings for employee taxes (in Shares)		(74,000)
Stock compensation plan withholdings for employee taxes	(19)	$ (19)
Unrealized holding gain (loss) on available-for-sale securities	4	$ 0		4
Akorn AG pension liability adjustment	$ 115			115
ENDING BALANCES (In Shares) at Jun. 30, 2020	133,407,696	133,408,000
ENDING BALANCES at Jun. 30, 2020	$ (78,699)	$ 607,565	$ (659,327)	$ (26,937)