Balance Sheet Components - Schedule of Property, Plant and Equipment Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 13,812	$ 16,605
Accumulated depreciation	(2,643)	(1,642)
Property, plant and equipment, net	11,169	14,963
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	2,091	2,091
Laboratory Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	2,868	2,868
Computer Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	1,115	1,115
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	864	898
Construction in Progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 6,874	$ 9,633