Other Financial Statement information - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment at cost	$ 31,520	$ 54,316
Less: accumulated depreciation	(6,182)	(2,955)
Property and equipment, net	25,338	51,361
Lab equipment
Property, Plant and Equipment [Line Items]
Property and equipment at cost	8,186	7,855
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment at cost	22,648	1,869
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment at cost	360	374
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment at cost	326	326
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment at cost	$ 0	$ 43,892