Revenue - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Non-refundable upfront payment	$ 91,496		$ 91,496		$ 80,272
Remaining performance obligation	56,000		56,000
Contract with customer, liability, revenue recognized			1,330
Collaboration revenue
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenues	1,000	$ 0	1,300	$ 0
Viatris
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue recognition annual sales			$ 50,000
Revenue recognition annual sales of maturity period			4 years
Fosun
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contingent payments	204,500		$ 204,500
Remaining performance obligation	41,000		41,000
Milestone payment receivable	13,500		13,500
Milestone payment, foreign withholding taxes	1,500		1,500
Contract with customer, liability, revenue recognized		$ 100		$ 100
Viatris
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Non-refundable upfront payment	60,000		60,000
Contingent payments	70,000		70,000
Revenue maximum for receipt of tiered milestone payments			225,000
Remaining performance obligation	30,000		30,000
Fosun
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Contract with customer, liability, revenue recognized	$ 0		$ 0