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Restructuring - Narrative (Details) - USD ($)	12 Months Ended
Restructuring - Narrative (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 0	$ 7,911,000	$ 0
Asset impairment charge	0	2,704,000	7,235,000
Decrease in contingent consideration	$ 0	763,000	7,377,000
Product Portfolio Rationalization
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		0
Non-Alcohol Docetaxel Injection
Restructuring Cost and Reserve [Line Items]
Decrease in contingent consideration			$ (6,200,000)
Non-Alcohol Docetaxel Injection \| Product Portfolio Rationalization
Restructuring Cost and Reserve [Line Items]
Decrease in contingent consideration		790,000
Non-Alcohol Docetaxel Injection \| Product Portfolio Rationalization
Restructuring Cost and Reserve [Line Items]
Asset impairment charge		$ 2,704,000