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STOCK BASED COMPENSATION PLANS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted |  | 69,360 |  |
Stock option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense |  | $ 425 | $ 197 | $ 91
Unrecognized compensation cost related to unvested stock options |  | $ 201 |  |
Cost is expected to be recognized period |  | 1 month 6 days |  |
Restricted stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  | 91,428 |  |
Number of restricted stock awards unvested |  | 89,043 | 293,717 |
Directors | Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period (in years) |  | 1 year |  |
Deferred compensation expense |  | $ 553 | $ 570 | 560
2012 Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted | 0 |  |  |
2012 Plan | Restricted stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense |  | 5,100 | $ 2,200 | $ 2,400
Number of restricted stock awards granted |  |  | 78,952 | 83,782
Total fair value of shares vested |  | 8,800 | $ 2,500 | $ 1,500
Unrecognized compensation cost related to non-vested RSAs |  | $ 2,200 |  |
Cost is expected to be recognized period |  | 1 month 6 days |  |
2012 Plan | Restricted stock | Five year specified vesting schedule |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  | 57,850 | 49,925 | 44,750
Vesting period (in years) |  | 5 years |  | 5 years
Year in vesting schedule in which one-third of the awards vest, period one |  |  | 5 years |
2012 Plan | Restricted stock | Three year specified vesting schedule |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  |  | 29,027 | 13,915
Vesting period (in years) |  |  |  | 3 years
Year in vesting schedule in which one-third of the awards vest, period one |  |  | 3 years |
2012 Plan | Restricted stock | Three year ratable vesting |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  | 33,578 |  |
Vesting period (in years) |  | 3 years |  |
2012 Plan | Restricted stock | Two year ratable vesting |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  |  | 25,117 |
Vesting period (in years) |  |  | 2 years |
LTI Plan | Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense |  | $ 1,600 | $ 693 | $ 462
Number of restricted stock awards granted |  | 26,556 |  |
Number of restricted stock awards unvested |  | 38,275 | 85,342 |
Unrecognized compensation cost related to non-vested RSAs |  | $ 600 |  |
Cost is expected to be recognized period |  | 1 month 6 days |  |
LTI Plan | Restricted stock units | Time-vested RSAs vest ratably over five years |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  | 17,943 |  |
Vesting period (in years) |  | 3 years |  |
LTI Plan | Restricted stock units | Performance-based RSAs vest |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  | 8,613 |  |
Vesting period (in years) |  | 3 years |  |
LTI Plan | NEOs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted |  | 69,360 | 63,267 | 47,393
Percentage premium over the grant date stock price |  | 10.00% | 10.00% | 10.00%
Vesting period (in years) |  | 3 years | 3 years | 3 years
Weighted-average grant-date fair value |  | $ 4.10 | $ 5.05 | $ 6.52
Method used |  | Black-Scholes option-pricing model |  |
LTI Plan | NEOs | Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  |  | 22,305 |
LTI Plan | NEOs | Restricted stock units | Time-vested RSAs vest ratably over five years |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  |  | 13,255 |
Vesting period (in years) |  |  | 5 years |
LTI Plan | NEOs | Restricted stock units | Performance-based RSAs vest |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of restricted stock awards granted |  |  | 9,050 |
Vesting period (in years) |  |  | 3 years |

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