Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 95,503	$ 91,019
Less accumulated depreciation and amortization	(20,845)	(11,693)
Total property and equipment, net	74,658	79,326
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment, gross	66,618	66,618
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment, gross	746	745
Research Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	16,914	14,298
Computers and Software
Property Plant And Equipment [Line Items]
Total property and equipment, gross	404	404
Construction in Progress
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 10,821	$ 8,954