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FAIR VALUE (Narratives) (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2018 shares | Jun. 30, 2020 USD ($) Y shares | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) Y shares | Jun. 30, 2019 USD ($) | Dec. 31, 2019 Y | Dec. 31, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Debt settlement |  |  | $ 2,364,000 |  | $ 2,364,000 |  |
Loss on derivative |  | $ 0 |  | $ 0 |  |  |
Derivative asset (liability) |  |  |  |  |  |  | $ 62,000
Bridge Notes Redemption Feature [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  |  | 30,000
Conversion Option [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  |  | $ 32,000
2016 Warrant Liability [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants outstanding (in shares) | shares |  | 357 |  | 357 |  |  |
(Decrease) in warrant liability |  |  |  | $ (400,000) |  |  |
Warrants canceled in settlement agreement | shares |  |  |  | 1,347 |  |  |
Measurement Input, Price Volatility [Member] | 2016 Warrant Liability [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 119 |  | 119 |  |  |
Measurement Input, Risk Free Interest Rate [Member] | 2016 Warrant Liability [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.18 |  | 0.18 |  |  |
Measurement Input, Expected Term [Member] | 2016 Warrant Liability [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Y |  | 0.50 |  | 0.50 |  |  |
April 2018 Warrants |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Stock rights issued (in shares) | shares | 243,224 |  |  |  |  |  |
Quarter 4 2018 Warrants | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 140 |
Quarter 4 2018 Warrants | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 1.59 |
Quarter 4 2018 Warrants | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Y |  |  |  |  |  | 1 |
Minimum | April 2018 Warrants | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 123 |  | 123 |  |  |
Minimum | April 2018 Warrants | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.16 |  | 0.16 |  |  |
Minimum | April 2018 Warrants | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Y |  | 1.81 |  | 1.81 |  |  |
Maximum | April 2018 Warrants | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 159 |  | 159 |  |  |
Maximum | April 2018 Warrants | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.24 |  | 0.24 |  |  |
Maximum | April 2018 Warrants | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Y |  | 3.87 |  | 3.87 |  |  |

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