Balance Sheet Components - Summary of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property and equipment at cost	$ 1,310	$ 15,589
Less: accumulated depreciation	(198)	(4,294)
Property and equipment, net	1,112	11,295
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment at cost	871	871
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment at cost	245	680
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and equipment at cost	120	120
Laboratory Equipment
Property, Plant and Equipment [Line Items]
Property and equipment at cost		13,832
Construction in Progress
Property, Plant and Equipment [Line Items]
Property and equipment at cost	$ 74	$ 86