Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 102,691	$ 99,968
Less: accumulated depreciation	(44,488)	(36,785)
Total property and equipment, net	58,203	63,183
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 56,453	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	$ 40,686	39,428
Furniture and fixtures
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Property and equipment, gross	$ 2,837	2,696
Computer equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	3 years
Property and equipment, gross	$ 2,679	2,778
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 36	$ 1,074

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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