License Agreements and Acquired Product Rights (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Acquired assets	$ 53,376	$ 60,356
Shiongi License And Supply Agreement
Finite-Lived Intangible Assets [Line Items]
Acquired assets	30,636
Shiongi License And Supply Agreement | Symproic license and distribution rights
Finite-Lived Intangible Assets [Line Items]
Acquired assets	30,000
Shiongi License And Supply Agreement | Transaction expenses
Finite-Lived Intangible Assets [Line Items]
Acquired assets	$ 636