Revenue - Reimbursement of R and D Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Research and Development Reimbursement
Total reduction to R and D expense	$ 10,078	$ 5,589	$ 9,112
Janssen
Research and Development Reimbursement
Total reduction to R and D expense	8,554	5,129	1,597
Viatris
Research and Development Reimbursement
Total reduction to R and D expense	$ 1,524	$ 460	$ 7,515