Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Product Information [Line Items]
Net product sales	$ 25,400	$ 31,602
CINVANTI
Product Information [Line Items]
Net product sales	25,200	28,000
SUSTOL
Product Information [Line Items]
Net product sales	$ 200	$ 3,600