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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2021 | Apr. 16, 2021 | Mar. 04, 2021 | Jun. 08, 2020
Short-term Debt [Line Items] |  |  |  |  |
Payroll support program proceeds |  | $ (6,363) |  |  |
Payroll Support Programs |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Debt instrument, face |  |  |  | $ 5,500 | $ 16,400
CARES Act proceeds |  | 3,700 |  |  |
Payroll support program proceeds | $ 2,900 | 2,700 |  |  |
PSP 3 |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |
Debt instrument, face | $ 5,500 | $ 5,500 | $ 5,500 |  |

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