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STOCK-BASED COMPENSATION, Non-nested, Service-based Restricted Stock and RSU Awards (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Service-based Restricted Stock Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense | $ 200 | $ 200 | $ 400 | $ 400
Service-based Restricted Stock and RSU Awards [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
2020 | 412 |  | 412 |
2021 | 797 |  | 797 |
2022 | 760 |  | 760 |
2023 | 516 |  | 516 |
Total unrecognized expense | $ 2,485 |  | 2,485 |
Performance Based Restricted Stock Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  |  | $ 0 |
Restricted Stock and RSUs [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares issued from vesting of restricted stock (in shares) |  |  | 20,804 |

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