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STOCK-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 07, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jul. 31, 2020 | Jun. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock compensation expense |  |  |  |  |  |  | $ 0.4 | $ 0.3 |
Stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Weighted average value per share of stock option grants (in USD per share) |  |  |  |  |  |  | $ 0.95 | $ 0.94 |
Stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock options granted (in shares) |  |  |  |  |  |  | 390,000 |  |
Weighted average value per share of stock option grants (in USD per share) |  |  |  |  |  |  | $ 1.74 |  |
Unrecognized compensation cost |  | $ 0.5 |  |  |  |  | $ 0.5 |  |
Weighted-average period of unrecognized compensation cost expected to be recognized |  |  |  |  |  |  | 1 year 10 months 24 days |  |
2015 Equity Incentive Plan |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Shares authorized for issuance |  |  |  |  |  |  |  |  | 2,500,000
Award terms |  |  |  |  |  |  | 10 years |  |
Number of shares available for future issuance (in shares) |  | 102,002 |  |  |  |  | 102,002 |  |
2015 Equity Incentive Plan | Stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock options granted (in shares) |  |  | 10,000 |  | 330,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value |  |  | $ 1.96 |  | $ 1.73 |  |  |  |
Vesting period of remaining shares |  |  |  |  |  | 3 years |  |  |
2015 Equity Incentive Plan | Director | Stock options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock options granted (in shares) |  | 2,000 |  | 16,000 | 32,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value |  | $ 3.73 |  | $ 1.51 | $ 1.73 |  |  |  |
Vesting period of remaining shares |  | 1 year |  | 1 year | 1 year |  |  |  |
Issuance of share based compensation (in shares) |  | 1,675 |  | 15,894 | 13,872 |  |  |  |
2015 Equity Incentive Plan | President And Chief Executive Officer | Stock options | Subsequent Event |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock options granted (in shares) | 124,120 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value | $ 3.93 |  |  |  |  |  |  |  |
Vesting period of remaining shares | 3 years |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | 92,093 |  |  |  |  |  |  |  |
2015 Equity Incentive Plan | President And Chief Executive Officer | Performance Shares [Member] | Subsequent Event |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of stock options granted (in shares) | 69,975 |  |  |  |  |  |  |  |
Vesting period of remaining shares | 3 years |  |  |  |  |  |  |  |
Stock Based Awards, Incentive Marker 1, Percentage | 10.00% |  |  |  |  |  |  |  |
Stock Based Awards, Incentive Marker 2, Percentage | 12.00% |  |  |  |  |  |  |  |
2015 Equity Incentive Plan | President And Chief Executive Officer | Performance Shares [Member] | First anniversary |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Vesting percentage | 0.17% |  |  |  |  |  |  |  |
2015 Equity Incentive Plan | President And Chief Executive Officer | Performance Shares [Member] | Monthly after first anniversary |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Vesting percentage | 0.17% |  |  |  |  |  |  |  |

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