Income Taxes - Significant Components of Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets:
Net operating loss carryforwards	$ 102,514	$ 82,599
Capitalized R&D	45,965	23,652
Deferred revenue	7,824	16,196
Lease liability	6,340	1,635
Stock-based compensation	17,717	11,720
Tax credits	10,503	8,473
Other	298	3,515
Total deferred tax assets	191,161	147,790
Deferred tax liabilities:
Right-of-use assets	5,737	1,361
Total deferred tax liabilities	5,737	1,361
Deferred tax assets, net	185,424	146,429
Valuation allowance	185,424	146,429
Total deferred tax liability	$ 0	$ 0