Balance Sheet Details - Property And Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Offsetting Liabilities [Line Items]
Total property and equipment, gross	$ 52,990	$ 16,957
Less accumulated depreciation	(3,294)	(1,873)
Total	49,696	15,084
Laboratory equipment
Offsetting Liabilities [Line Items]
Total property and equipment, gross	8,989	7,484
Computer equipment and software
Offsetting Liabilities [Line Items]
Total property and equipment, gross	304	185
Furniture and fixtures
Offsetting Liabilities [Line Items]
Total property and equipment, gross	522	522
Leasehold improvements
Offsetting Liabilities [Line Items]
Total property and equipment, gross	163	163
Construction in progress
Offsetting Liabilities [Line Items]
Total property and equipment, gross	$ 43,012	$ 8,603