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STOCKHOLDERS' EQUITY (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 $ / shares
STOCKHOLDERS' EQUITY (Details) [Line Items] |  |  |  |
Common stock, shares authorized |  | 44,000,000 | 44,000,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized |  | 2,350,000 |  |
Aggregate Value of Common Stock and Other Securities Registered for Sale | $ |  | $ 150,000 | $ 1,480 |
Aggregate Shares of Common Stock Allocated for Acquisitions | $ / shares |  | $ 12,500,000 |  |
Stock Repurchase Program, Authorized Amount | $ |  |  | $ 5 |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  | 364,000 |
Options Outstanding |  | 1,893,000 | 1,245,000 |
Share-based Compensation Arrangement by Share-based Payment Award Options Outstanding Exchange Exercise Price | $ / shares |  |  |  | $ 8.50
Share-based Compensation Arrangement by Share-based Payment Award Options Underlying An Eligible Option in Exchange For One New RSU, Number |  |  |  | 2.5
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | 187,000 | 118,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award Options Cancellation of Shares in Exchange Program | 468,000 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares |  | $ 3.63 | $ 2.44 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ |  | $ 110 | $ 205 |
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ |  | 3,771 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ |  | 1,507 | $ 528 |
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $ |  | $ 1,485 |  |
Restricted Stock Units (RSUs) |  |  |  |
STOCKHOLDERS' EQUITY (Details) [Line Items] |  |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  | 1 year 9 months 10 days |  |
Equity Option |  |  |  |
STOCKHOLDERS' EQUITY (Details) [Line Items] |  |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  | 2 years 3 months 14 days |  |
2018 Plan |  |  |  |
STOCKHOLDERS' EQUITY (Details) [Line Items] |  |  |  |
Options Outstanding |  | 1,958,000 |  |
Share-based Payment Arrangement |  |  |  |
STOCKHOLDERS' EQUITY (Details) [Line Items] |  |  |  |
Options Outstanding |  | 2,110,000 |  |
2020 Underwritten Public Offering [Member] |  |  |  |
STOCKHOLDERS' EQUITY (Details) [Line Items] |  |  |  |
Sale of Stock, Number of Shares Issued in Transaction |  |  | 2,990,000 |
Sale of Stock, Price Per Share | $ / shares |  | $ 7.25 |  |
Sale of Stock, Consideration Received on Transaction | $ |  |  | $ 21,700 |

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