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SHARE-BASED COMPENSATION - Summary of Stock options activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Weighted Average Remaining Contractual Life and Aggregate Intrinsic Value |  |  |  |  |  |  |  |
Outstanding (in years) |  | 7 years 9 months 10 days | 8 years 10 days |  |  |  |  |
Exercisable (in years) |  | 7 years 10 months 6 days |  |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |  |
Number of units |  |  |  |  |  |  |  |
Outstanding at the beginning | 1,000,000 | 1,000,000 | 1,006,000 |  | 1,006,000 | 1,025,000 | 1,025,000 |
Granted | 19,000 |  |  |  |  |  | 43,000 |
Exercised | (6,000) |  | (6,000) |  |  |  | (6,000) |
Forfeited |  |  |  |  |  |  | (56,000) |
Outstanding at the end | 1,013,000 | 1,000,000 | 1,000,000 |  | 1,013,000 |  | 1,006,000 | 1,025,000
Exercisable | 184,000 | 191,000 | 90,000 |  | 184,000 |  | 96,000 |
Weighted Average Exercise Price Per Unit |  |  |  |  |  |  |  |
Outstanding at the beginning (in dollars per share) | $ 41.51 | $ 41.51 | $ 41.35 |  | $ 41.35 | $ 40.59 | $ 40.59 |
Granted (in dollars per share) | 25.83 |  |  |  |  |  | 22.94 |
Exercised (in dollars per share) | 16.01 |  | 16.01 |  |  |  | 16.01 |
Forfeited (in dollars per share) |  |  |  |  |  |  | 16.01 |
Outstanding at the end (in dollars per share) | 41.37 | 41.51 | 41.51 |  | 41.37 |  | 41.35 | $ 40.59
Exercisable (in dollars per share) | 43.49 | 42.59 | 44.00 |  | 43.49 |  | 42.18 |
Weighted Average Grant Date Fair Value Per Unit |  |  |  |  |  |  |  |
Outstanding at the beginning (in dollars per share) | 5.20 | 5.20 | 5.22 |  | 5.22 | $ 4.99 | 4.99 |
Granted (in dollars per share) | 19.12 |  |  |  |  |  | 15.32 |
Exercised (in dollars per share) | 8.57 |  | 8.57 |  |  |  | 8.57 |
Forfeited (in dollars per share) |  |  |  |  |  |  | 8.57 |
Outstanding at the end (in dollars per share) | 5.44 | 5.20 | 5.20 |  | $ 5.44 |  | 5.22 | $ 4.99
Exercisable (in dollars per share) | $ 4.73 | $ 4.86 | $ 4.49 |  |  |  | $ 4.76 |
Weighted Average Remaining Contractual Life and Aggregate Intrinsic Value |  |  |  |  |  |  |  |
Outstanding (in years) | 7 years 5 months 19 days | 7 years 9 months 10 days | 8 years 10 days |  |  |  | 8 years 3 months 10 days | 9 years 5 months 8 days
Granted (in years) | 4 years 10 months 6 days |  |  |  |  |  | 4 years 8 months 12 days |
Exercisable (in years) | 7 years 10 months 6 days |  | 8 years 5 months 8 days |  |  |  | 8 years 5 months 8 days |
Exercisable (in dollars) | $ 21 | $ 45 |  |  | $ 21 |  |  |
Non-vested shares | 829,000 |  |  |  | 829,000 |  |  |
Unrecognized compensation expense | $ 4,387 |  |  |  | $ 4,387 |  |  |
Unrecognized compensation expense, recognition period |  |  |  |  | 7 years 6 months |  |  |
Share based compensation expense | $ 168 |  |  | $ 131 | $ 462 | $ 386 |  |

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