STOCKHOLDERS' EQUITY - Summary of Equity-based Compensation (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Share-based compensation | $ 613 | $ 1,879 | $ 5,314 | $ 7,993 |
| Research and development | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Share-based compensation | 184 | 810 | 2,250 | 3,269 |
| General and administrative | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Share-based compensation | $ 429 | $ 1,069 | $ 3,064 | $ 4,724 |