Balance Sheet Components - Schedule of Property and Equipment Net (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 99,984	$ 129,914
Less accumulated depreciation	(35,193)	(33,896)
Total property and equipment, net	$ 64,791	96,018
Minimum
Property Plant And Equipment [Line Items]
Useful life (in years)	3 years
Maximum
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Laboratory equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Property and equipment, gross	$ 40,963	43,728
Computer equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	3 years
Property and equipment, gross	$ 2,615	2,783
Furniture and fixtures
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Property and equipment, gross	$ 2,553	2,887
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 53,140	80,290
Leasehold improvements | Minimum
Property Plant And Equipment [Line Items]
Useful life (in years)	8 years
Leasehold improvements | Maximum
Property Plant And Equipment [Line Items]
Useful life (in years)	12 years
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 713	$ 226