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LONG-TERM DEBT (Settlement Agreement) (Details) - USD ($) $ in Thousands | Sep. 21, 2018 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total debt |  | $ 1,010 | $ 519
Settlement Agreement [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt |  |  | 34
Settlement Agreement [Member] | Settlement Agreements |  |  |
Debt Instrument [Line Items] |  |  |
Frequency of periodic payment | monthly |  |
Debt instrument, term | 2 years |  |
Date of first required payment | Nov. 01, 2018 |  |
Maturity date | Nov. 01, 2020 |  |
Debt instrument, face amount | $ 100 |  |
Interest rate (as a percent) |  | 10.00% |
Total debt |  |  | $ 100

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