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LONG-TERM DEBT - Rollforward (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Long-term debt |  |  |
Balance, beginning of year | $ 63,979 | $ 48,866 |
Promissory note - initial recognition |  | 15,000 | $ 40,000
Principal repayment on debt | (25,000) |  |
Interest expense | 5,749 | 5,488 |
Interest payments | (4,728) | (4,875) |
Bonus interest-equity-based financing fee |  | (500) |
Balance, end of year | 40,000 | 63,979 | $ 48,866
Less: current portion |  | 10,000 |
Long-term portion | $ 40,000 | $ 53,979 |

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