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SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS - Share-Based Payment Arrangement, Option [Member] - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2014 | May 31, 2022 | May 31, 2021 | Dec. 11, 2020
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 1,260,000 | $ 1,355,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) |  |  | $ 4.43 | $ 6.73 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value |  |  | $ 90,000 | $ 501,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value |  |  | 1,838,000 | 2,132,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value |  |  | 1,731,000 | 1,872,000 |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount |  |  | $ 1,982,000 |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  |  | 2 years 3 months 25 days |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term |  |  | 5 years 5 months 19 days |  |
2014 Plan [Member] |  |  |  |  |
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in Shares) |  | 850,000 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent |  | 80.00% |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period |  | 10 years |  |  |
2017 Plan [Member] |  |  |  |  |
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in Shares) | 900,000 |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent | 80.00% |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period | 10 years |  |  |  |
2020 Plan [Member] |  |  |  |  |
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in Shares) |  |  |  |  | 900,000
General and Administrative Expense [Member] |  |  |  |  |
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 954,000 | 957,000 |
Cost of Sales [Member] |  |  |  |  |
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | 159,000 | 205,000 |
Research and Development Expense [Member] |  |  |  |  |
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | 80,000 | 125,000 |
Selling and Marketing Expense [Member] |  |  |  |  |
SHAREHOLDERS' EQUITY (Details) - STOCK OPTION AND RESTRICTED STOCK PLANS [Line Items] |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 67,000 | $ 68,000 |

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