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STOCK-BASED COMPENSATION, Stock Option Awards (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Information Related to Stock Option Plans [Abstract] |  |  |  |
Cash received for option exercise cost |  |  | $ 396 | $ 38
Stock Option Awards [Member] |  |  |  |
Number of Options [Roll Forward] |  |  |  |
Options outstanding, beginning of period (in shares) |  |  | 28,842 |
Options outstanding at January 1, 2021 as adjusted for conversion (in shares) | 18,685 |  | 18,685 |
Options acquired (in shares) |  |  | 180,020 |
Options exercised (in shares) |  |  | 17,102 |
Options outstanding, end of period (in shares) | 181,603 |  | 181,603 |
Options vested and exercisable, end of period (in shares) | 181,603 |  | 181,603 |
Weighted-Average Exercise Price [Abstract] |  |  |  |
Options outstanding, beginning of period (in dollars per share) |  |  | $ 15.05 |
Options outstanding at January 1, 2021 as adjusted for conversion (in dollars per share) | $ 23.23 |  | 23.23 |
Options acquired (in dollars per share) |  |  | 35.39 |
Options exercised (in dollars per share) |  |  | 23.40 |
Options outstanding, end of period (in dollars per share) | 35.26 |  | 35.26 |
Options vested and exercisable. end of period (in dollars per share) | $ 35.26 |  | $ 35.26 |
Weighted-Average Remaining Contractual Years |  |  |  |
Options outstanding |  |  | 8 years 1 month 6 days |
Options vested and exercisable |  |  | 8 years 1 month 6 days |
Aggregate Intrinsic Value [Abstract] |  |  |  |
Options outstanding | $ 19 |  | $ 19 |
Options vested and exercisable | 19 |  | 19 |
Information Related to Stock Option Plans [Abstract] |  |  |  |
Cash received for option exercise cost | 28 | $ 38 | 396 | 38
Intrinsic value of options exercised | $ 11 | $ 8 | $ 77 | $ 8

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