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Income Taxes - Summary of net deferred tax assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Deferred tax assets: |  |  |  |
Accrued bonus | $ 2,036 | $ 3,652 |  |
Unearned revenue | 158 | 1,233 |  |
Stock-based compensation | 9,793 | 7,308 |  |
Depreciation and amortization | 3,109 | 2,843 |  |
Capitalized R&D costs | 62,939 | 27,432 |  |
Lease liabilities | 4,483 | 2,031 |  |
R&D credit carryforwards | 29,800 | 11,428 |  |
Net operating loss carryforwards | 56,204 | 36,197 |  |
Other | 677 | 686 |  |
Total deferred tax assets | 169,199 | 92,810 |  |
Valuation allowance | (166,287) | (90,963) | $ (48,212) | $ (20,388)
Total deferred tax assets net of valuation allowance | 2,912 | 1,847 |  |
Deferred tax liabilities: |  |  |  |
Right of use assets | (2,386) | (1,142) |  |
Other | (526) | (705) |  |
Total deferred tax liabilities | (2,912) | (1,847) |  |
Net deferred tax assets (liabilities) | $ 0 | $ 0 |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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