STOCKHOLDERS' EQUITY - Summary of Equity-based Compensation (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||||
| Share-based compensation | $ 424 | $ 1,614 | $ 1,037 | $ 3,493 | $ 5,314 | $ 7,993 |
| Research and development | ||||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||||
| Share-based compensation | 35 | 618 | 219 | 1,428 | 2,250 | 3,269 |
| General and administrative | ||||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||||
| Share-based compensation | $ 389 | $ 996 | $ 818 | $ 2,065 | $ 3,064 | $ 4,724 |