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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]    
Net operating loss carryforwards $ 94,198 $ 70,996
Research and development credits 29,095 16,070
Other intangibles 5 3
Accruals and reserves 1,116 1,074
Stock-based compensation 5,599 5,185
Capitalized research and development 49,837 36,568
Lease liabilities 6,087 6,610
Total gross deferred tax assets 185,937 136,506
Less: valuation allowance (180,958) (130,939)
Total deferred tax assets, net 4,979 5,567
Fixed assets (1,469) (1,771)
Right-of-use assets (3,510) (3,796)
Total gross deferred tax liabilities (4,979) (5,567)
Net deferred tax assets $ 0 $ 0