Supplementary Balance Sheet Information - Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 35,108	$ 33,479
Less accumulated depreciation	(6,533)	(5,612)
Total property and equipment, net	28,575	27,867
Lab Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,100	6,089
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	26,262	24,713
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,225	1,221
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,067	1,034
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	325	325
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	97	$ 97
Construction in Process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 32