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ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019 | Jan. 29, 2019 | Jan. 15, 2019
Reduction in Certain Accrued Expense and Accounts Payable | $ 0 | $ 200 |  |  |
Common stock warrant liabilities | $ 402 |  | $ 1,338 |  |
Gain (loss) on settlement of equity instruments |  | 167 |  |  |
Proceeds from convertible notes |  | $ 250 |  |  |
Crede Note |  |  |  |  |
Issuance of convertible notes |  |  |  |  | $ 1,450
Settled Litigation | Leviston Resources LLC |  |  |  |  |
Issuance of convertible notes |  |  |  | $ 700 |

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