Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 95,769	$ 95,503
Less accumulated depreciation and amortization	(23,144)	(20,845)
Total property and equipment, net	72,625	74,658
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	746
Research Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	17,481	16,914
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	$ 10,520	$ 10,821