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DEBT - Future Minimum Payments Under Loan Agreement (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Debt Disclosure [Abstract] |  |
Remainder of 2023 | $ 1,801 |
2024 | 39,362 |
2025 | 20,056 |
Total | 61,219 |
Less: amount representing interest | (7,944) |
Less: unamortized debt discounts and issuance costs | (408) |
Less: unaccrued end of term charge | (969) |
Less: current portion of debt | (22,060) |
Noncurrent portion of debt | $ 29,838 | $ 30,212

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