Agreements - Terminated Agreements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from contract with customer	$ 18,189	$ 13,281	$ 46,501	$ 37,407
License and milestone fees
Revenue from contract with customer	$ 97	$ 79	1,325	$ 5,237
Takeda | Technological Improvements
Amortization of deferred revenue			$ 900