Balance Sheets 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	$ 176,352	$ 142,320
Accumulated depreciation	(77,125)	(59,845)
Total property and equipment, net	99,227	82,475
Lab and manufacturing equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	152,446	119,964
Computer equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,018	3,833
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,177	1,167
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	10,425	9,538
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 8,286	$ 7,818