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STOCKHOLDERS' EQUITY (Deemed Dividends) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Class of Stock [Line Items] |  |  |  |
Amount Recorded | $ 0 | $ 0 | $ 0 | $ 3,344
2018 Purchase Agreement | Deemed Dividend A |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 3,333
2018 Purchase Agreement | Deemed Dividend B |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | 6
2018 Purchase Agreement | Deemed Dividend C |  |  |  |
Class of Stock [Line Items] |  |  |  |
Amount Recorded |  |  |  | $ 5

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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