Commitments and Contingencies (Details) shares in Millions									3 Months Ended	12 Months Ended
	Apr. 22, 2020 USD ($)	Apr. 07, 2020 USD ($) shares	Apr. 01, 2020 USD ($) shares	Nov. 14, 2019 USD ($)	Aug. 16, 2019 USD ($)	Jul. 30, 2019 USD ($) shares	Jul. 25, 2019	Sep. 05, 2018 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Contingent Potential Milestone Payments, Year ending December 31,
2020									$ 2,907,000
2021									1,105,000
2022									250,000
2023									250,000
Total									4,512,000
Percentage of excess EBITDA						33.30%
Loss contingency, EBITDA net leverage ratio						3.0
Contingent value rights, minimum cash cushion						$ 100,000,000
Loss contingency liability									35,500,000
Current portion of accrued legal fees and contingencies									14,873,000	$ 23,673,000
Loss contingency accrual, period increase (decrease)									$ 7,500,000
Akorn, Inc v. Fresenius
Contingent Potential Milestone Payments, Year ending December 31,
Damages sought				$ 117,000,000	$ 123,000,000
Akorn, Inc v. Fresenius | Subsequent Event
Contingent Potential Milestone Payments, Year ending December 31,
Damages denied	$ 43,000,000
Date Integrity Securities Litigation, First Occurrence
Contingent Potential Milestone Payments, Year ending December 31,
Damages sought						$ 30,000,000		$ 1,070,000,000.00
Loss contingency, shares | shares						6.5
Contingent value rights, aggregate cap per year						$ 12,000,000
Contingent value rights, aggregate cap per term						$ 60,000,000
Date Integrity Securities Litigation, Second Occurrence
Contingent Potential Milestone Payments, Year ending December 31,
Damages sought								$ 613,000,000
Securities Class Action Litigation
Contingent Potential Milestone Payments, Year ending December 31,
Contingent value rights, duration of term							5 years
Loss contingency, additional shares released, value			$ 1,200,000
Securities Class Action Litigation | Subsequent Event
Contingent Potential Milestone Payments, Year ending December 31,
Loss contingency, shares | shares			6.7
Loss contingency, shares, value			$ 4,400,000
Proceeds received from insurance carrier		$ 27,500,000	$ 27,500,000
Securities Class Action Litigation | Subsequent Event | Settlement Shares
Contingent Potential Milestone Payments, Year ending December 31,
Loss contingency, shares | shares		6.7
Securities Class Action Litigation | Subsequent Event | CVR
Contingent Potential Milestone Payments, Year ending December 31,
Loss contingency, shares | shares		6.7
State of Louisiana v. Hi-Tech, et. al
Contingent Potential Milestone Payments, Year ending December 31,
Loss contingency, damages paid, value										43,000,000.0
Loss contingency accrual, contingent value right										$ 30,000,000.0