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STOCKHOLDERS' EQUITY - Stock Based Compensation - Shares subject to awards outstanding (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jan. 05, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Restricted stock |  |  |  |
Stock Based Compensation |  |  |  |
Number of shares awarded |  | 153,575 | 151,500 | 149,550
Vesting period |  | 5 years |  |
RSUs |  |  |  |
Stock Based Compensation |  |  |  |
Number of shares awarded |  | 85,350 | 80,700 | 75,026
2022 Incentive Plan |  |  |  |
Stock Based Compensation |  |  |  |
Maximum number of shares authorized for issuance |  | 750,000 |  |
2022 Incentive Plan | Restricted stock and RSU grants |  |  |  |
Stock Based Compensation |  |  |  |
Shares subject to awards outstanding |  | 85,350 |  |
Value of shares awarded | $ 3,379,000 |  |  |
2022 Incentive Plan | Restricted stock |  |  |  |
Stock Based Compensation |  |  |  |
Number of shares awarded | 152,955 |  |  |
2022 Incentive Plan | RSUs |  |  |  |
Stock Based Compensation |  |  |  |
Shares subject to awards outstanding |  | 85,350 |  |
2019 Incentive Plan |  |  |  |
Stock Based Compensation |  |  |  |
Maximum number of shares authorized for issuance |  | 750,000 |  |
2019 Incentive Plan | Restricted stock and RSU grants |  |  |  |
Stock Based Compensation |  |  |  |
Shares subject to awards outstanding |  | 593,101 |  |
Remaining shares which may be granted under the Plan |  | 0 |  |
2019 Incentive Plan | Restricted stock |  |  |  |
Stock Based Compensation |  |  |  |
Shares subject to awards outstanding |  | 437,375 |  |
2019 Incentive Plan | RSUs |  |  |  |
Stock Based Compensation |  |  |  |
Shares subject to awards outstanding |  | 155,726 |  |
2016 Incentive Plan |  |  |  |
Stock Based Compensation |  |  |  |
Maximum number of shares authorized for issuance |  | 750,000 |  |
2016 Incentive Plan | Restricted stock and RSU grants |  |  |  |
Stock Based Compensation |  |  |  |
Shares subject to awards outstanding |  | 275,000 |  |
Remaining shares which may be granted under the Plan |  | 0 |  |
2016 Incentive Plan | Restricted stock |  |  |  |
Stock Based Compensation |  |  |  |
Shares subject to awards outstanding |  | 275,000 |  |

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