STOCK BASED COMPENSATION - Stock based compensation expense (Details) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2023 |
Sep. 30, 2022 |
Sep. 30, 2023 |
Sep. 30, 2022 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| STOCK BASED COMPENSATION | ||||||
| Intrinsic value of outstanding options | $ 0 | $ 0 | $ 0 | |||
| Stock-based compensation expense | 269,000 | $ 267,000 | 794,000 | $ 497,000 | 764,000 | $ 0 |
| Unrecognized stock compensation expense | 2,413,000 | $ 2,413,000 | $ 3,205,000 | |||
| Unrecognized stock compensation expense expected to be recognized over the remaining weighted average service period | 2 years 3 months 29 days | 3 years 25 days | ||||
| Research and Development Expense | ||||||
| STOCK BASED COMPENSATION | ||||||
| Stock-based compensation expense | 34,000 | 35,000 | $ 103,000 | 65,000 | $ 100,000 | |
| General and Administrative Expense | ||||||
| STOCK BASED COMPENSATION | ||||||
| Stock-based compensation expense | $ 235,000 | $ 232,000 | $ 691,000 | $ 432,000 | $ 664,000 | |