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STOCK-BASED COMPENSATION - Scientific Advisory Board Awards (Additional Information) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Deferred Compensation Arrangement With Employees And Non Employees Share Based Payments [Line Items] |  |  |  |
Research and development | $ 34,974 | $ 36,358 | $ 70,220 | $ 71,258
Employees And Non Employee Members Of Scientific Advisory Board [Member] |  |  |  |
Deferred Compensation Arrangement With Employees And Non Employees Share Based Payments [Line Items] |  |  |  |
Shares issued (in shares) |  |  | 2,520 | 2,070
Research and development | $ 60 | $ 60 | $ 120 | $ 118
Members of Scientific Advisory Board [Member] |  |  |  |
Deferred Compensation Arrangement With Employees And Non Employees Share Based Payments [Line Items] |  |  |  |
Fair value of shares issued |  |  | $ 300 | $ 300

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