SHARE-BASED COMPENSATION - Allocation of Share-based Compensation Expense on Statements of Operations (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Total share-based compensation expense | $ 10,844 | $ 11,767 | $ 21,064 | $ 24,455 |
| Research and development | ||||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Total share-based compensation expense | 5,173 | 5,791 | 10,921 | 12,470 |
| General and administrative | ||||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Total share-based compensation expense | $ 5,671 | $ 5,976 | $ 10,143 | $ 11,985 |