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CONVERTIBLE NOTES (Convertible Promissory Notes - Exchange Notes) (Details) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 17, 2018 | Feb. 12, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Feb. 28, 2018
Debt Instrument [Line Items] |  |  |  |  |  |
Total debt |  |  | $ 519,000 | $ 516,000 |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  | 909,189 |  |  |
Original debt amount |  |  |  | 456,000 |  |
Conversion of convertible debt plus interest into common stock |  | $ 1,900,000 | $ 7,553,000 | 2,356,000 |  |
Number of shares converted from debt instrument (in shares) |  | 120,983 |  |  |  |
Share Price |  | $ 15.60 |  |  |  |
Secured Debt [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, term |  |  | 48 months |  |  |
Date of first required payment |  |  | Jul. 01, 2018 |  |  |
Original debt amount |  |  |  | 3,200,000 |  |
Interest Expense, Debt |  |  | $ 600,000 |  |  |
Debt Restructured |  |  |  |  | $ 6,300,000 |
Creditor Warrants Relating to Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  |  |  |  |  | 7,207
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  |  |  | $ 112.50
Senior Secured Convertible Promissory Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount | $ 300,000 |  |  |  |  |
Debt instrument, term | 18 months |  |  |  |  |
Conversion of convertible debt plus interest into common stock |  |  |  | 2,800,000 |  |
Write off of derivative liability |  |  | 100,000 | 300,000 |  |
Settlement Agreements |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total debt |  |  |  |  | 3,200,000 |
Warrants and Rights Outstanding |  |  |  |  | 1,900,000 |
Warrants, fair value |  |  |  |  | $ 200,000 |
Convertible Debt [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total debt |  |  | 142,000 | 4,377,000 |  |
Convertible Debt [Member] | Convertible promissory notes - Exchange Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Conversion of convertible debt plus interest into common stock |  |  | $ 600,000 | $ 2,200,000 |  |
Number of shares converted from debt instrument (in shares) |  |  | 155,351 | 291,562 |  |

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