Collaboration, License, Co-Promotion and Other Commercial Agreements - Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts receivable, net
Accounts receivable, net	$ 22,795	$ 32,597
Accounts payable due related party	1,058	1,509
Collaborative arrangements and active pharmaceutical ingredient
Accounts receivable, net
Accounts receivable, net	40,500	43,900
Accounts receivable, net and related party accounts receivable, net, net of related party accounts payable	73,400	110,100
Accounts payable due related party	4,600	$ 4,100
Deferred revenue	$ 900