Deferred Revenue - Additional Information (Details) - USD ($) $ in Thousands		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Current deferred revenue	$ 55,340	$ 55,340	$ 64,115
Non-current deferred revenue	44,194	44,194	58,599
Revenue recognized	41,200	(53,873)
Development Revenue | Genentech, Inc.
Disaggregation Of Revenue [Line Items]
Current deferred revenue	21,200	21,200	31,800
Non-current deferred revenue	$ 41,400	$ 41,400	$ 55,500