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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jan. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares issued during the period (in shares) | 8,339 | 3,704 |
Fair value of options and RSUs granted | $ 0 | $ 800,000 |
2019 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 67,920 |  |
2018 Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 63,833 |  |
Increase in shares reserved for future issuance (in shares) |  |  | 41,666
ESPP |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares reserved for future issuance (in shares) | 108,124 |  |
Percentage of fair market value used as purchase price | 85.00% |  |
Percent of annual earnings that may be used to purchase shares | 15.00% |  |

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