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Stock Option Plan - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Stock-based compensation | $ 2,790 | $ 1,128 | $ 3,983 | $ 1,671
General and administrative | 6,561 | 3,895 | 11,581 | 7,292
Research and development | 24,729 | 17,882 | 47,618 | 33,201
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Stock-based compensation | 1,808 | 954 | 2,597 | 1,334
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |
Stock-based compensation | $ 982 | $ 174 | $ 1,386 | $ 337

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