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v3.21.1

NOTES PAYABLE - 2020 Credit Agreement (Details) - Notes payable - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 31, 2020 | Dec. 31, 2020 | Mar. 31, 2021
Debt Instrument [Line Items] |  |  |
Balance outstanding, end of period |  | $ 38,295 |
Debt discount |  | 571 | $ 425
2020 Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds from loan | $ 25,000 |  |
Fixed interest rate | 12.00% |  |
Interest rate, portion paid in cash | 8.00% |  |
Interest rate, portion added to principal | 4.00% |  |
Balance outstanding, end of period |  | 25,600 |
Debt discount |  | $ 200 |
2020 Credit Agreement | 2019 Preferred Stock Warrants |  |  |
Debt Instrument [Line Items] |  |  |
Warrants issued |  | 750,000 |

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