Revenue - Reimbursement of R and D Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Research and Development Reimbursement
Total reduction to R and D expense	$ 3,301	$ 1,404	$ 5,987	$ 5,796
Janssen
Research and Development Reimbursement
Total reduction to R and D expense	2,205	1,461	4,730	4,231
Viatris
Research and Development Reimbursement
Total reduction to R and D expense	$ 1,096	$ (57)	$ 1,257	$ 1,565