Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Product Information [Line Items]
Net product sales	$ 20,018	$ 25,400
Accounting Standards Update 2019-12
Product Information [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, immaterial effect	true
CINVANTI
Product Information [Line Items]
Net product sales	$ 18,500	25,200
SUSTOL
Product Information [Line Items]
Net product sales	$ 1,500	$ 200