Balance Sheet Components - Property and equipment, net (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross - Total	$ 6,157	$ 5,872
Less accumulated depreciation and amortization	(4,640)	(3,671)
Total	1,517	2,201
Total property and equipment, net	1,548	6,105
Laboratory equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross - Total	4,233	4,023
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross - Total	1,655	1,588
Office equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross - Total	165	157
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross - Total	104	104
Construction-in progress
Property, Plant and Equipment [Line Items]
Construction-in progress	$ 31	$ 3,904