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STOCK-BASED COMPENSATION - Narratives (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 shares | Dec. 31, 2024 USD ($) item $ / shares shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 shares
STOCK-BASED COMPENSATION |  |  |  |
Number of long-term incentive plans | item |  | 2 |  |
Common stock remaining for issuance | shares |  | 12,341,914 | 10,548,174 | 9,474,824
Stock-based compensation | $ |  | $ 3,800,000 | $ 4,200,000 |
Grant date exercise price range | $ / shares |  | $ 0.91 |  |
Total unrecognized compensation cost related to stock options | $ |  | $ 3,035,000 | $ 4,868,000 |
Amortized period |  | 32 months | 42 months |
Compensation expense | $ |  | $ 538,000 | $ 842,000 |
Restricted stock units |  |  |  |
STOCK-BASED COMPENSATION |  |  |  |
Stock-based compensation | $ |  | 600,000 | $ 900,000 |
Stock or unit option plan expense | $ |  | $ 0 |  |
Vesting period |  | 43 months | 37 months |
Employee stock options |  |  |  |
STOCK-BASED COMPENSATION |  |  |  |
Stock-based compensation | $ |  | $ 3,200,000 | $ 3,300,000 |
2006 Stock Option Plan |  |  |  |
STOCK-BASED COMPENSATION |  |  |  |
Common stock reserved for issuance | shares |  | 2,400,000 |  |
Common stock remaining for issuance | shares |  | 654,000 | 654,000 |
2014 Stock Option Plan |  |  |  |
STOCK-BASED COMPENSATION |  |  |  |
Common stock reserved for issuance | shares | 20,900,000 | 20,900,000 |  |
Common stock remaining for issuance | shares |  | 3,700,000 | 647,000 |
Shares reserved for future issuance | shares | 7,500,000 |  |  |

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