Income Taxes - Summary of net deferred tax assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Accrued bonus	$ 3,652	$ 1,018
Unearned revenue	1,233	0
Stock-based compensation	7,308	2,965
Depreciation and amortization	2,843	2,725
Capitalized R&D costs	27,432	8,262
Lease liabilities	2,031	1,068
R&D credit carryforwards	11,428	6,240
Net operating loss carryforwards	36,197	24,836
Other	686	2,256
Total deferred tax assets	92,810	49,370
Valuation allowance	(90,963)	(48,212)	$ (20,388)
Total deferred tax assets net of valuation allowance	1,847	1,158
Deferred tax liabilities:
Right of use assets	(1,142)	(989)
Other	(705)	(169)
Total deferred tax liabilities	(1,847)	(1,158)
Net deferred tax assets (liabilities)	$ 0	$ 0