Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property Plant And Equipment [Line Items]
Depreciation	$ 11,400	$ 14,200	$ 18,900
Property and equipment, gross	102,780	99,968
Less: accumulated depreciation and amortization	(47,160)	(36,785)
Total property and equipment, net	$ 55,620	63,183
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
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 56,180	53,992
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
Laboratory equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Property and equipment, gross	$ 40,961	39,428
Furniture and fixtures
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Property and equipment, gross	$ 2,836	2,696
Computer equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	3 years
Property and equipment, gross	$ 2,689	2,778
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 114	$ 1,074