STOCK BASED COMPENSATION - Stock based compensation expense (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| STOCK BASED COMPENSATION | ||||
| Stock-based compensation expense | $ 182,000 | $ 313,000 | $ 864,000 | $ 933,000 |
| Unrecognized stock compensation expense | 2,500,000 | $ 2,500,000 | ||
| Unrecognized stock compensation expense expected to be recognized over the remaining weighted average service period | 3 years 6 months 10 days | |||
| ADSs | Amended plan | ||||
| STOCK BASED COMPENSATION | ||||
| Intrinsic value of exercisable options | 0 | $ 0 | ||
| Granted | 155,983 | 0 | ||
| Research and Development Expense | ||||
| STOCK BASED COMPENSATION | ||||
| Stock-based compensation expense | 95,000 | 68,000 | $ 301,000 | $ 186,000 |
| General and Administrative Expense | ||||
| STOCK BASED COMPENSATION | ||||
| Stock-based compensation expense | $ 87,000 | $ 245,000 | $ 563,000 | $ 747,000 |