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DEBT - Paycheck Protection Program Loan (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Apr. 16, 2020 | Sep. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Aug. 13, 2021
Current and long-term debt |  |  |  |  |
Proceeds from issuance of debt |  |  | $ 145,000 | $ 119,209 |
Gain on extinguishment and accrued interest |  | $ 2,068 | 2,068 |  |
Paycheck Protection Program Loan |  |  |  |  |
Current and long-term debt |  |  |  |  |
Principal amount |  |  |  |  | $ 200
Proceeds from issuance of debt | $ 2,200 |  |  |  |
Interest rate (as a percent) | 1.00% |  |  |  |
Gain on extinguishment and accrued interest |  |  | $ 2,100 |  |

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