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Stock-Based Compensation - Total Stock-based Compensation Recognized (Details) - Stock Compensation Plan - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Stock-based compensation expense: |  |  |  |
Stock-based compensation expense | $ 2,577 | $ 1,431 | $ 7,283 | $ 3,439
Research and development |  |  |  |
Stock-based compensation expense: |  |  |  |
Stock-based compensation expense | 1,122 | 563 | 2,015 | 1,126
General and administrative |  |  |  |
Stock-based compensation expense: |  |  |  |
Stock-based compensation expense | $ 1,455 | $ 868 | $ 5,268 | $ 2,313

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