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FAIR VALUE (Narratives) (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 31, 2019 shares | Apr. 30, 2019 shares | Apr. 30, 2018 USD ($) shares | Dec. 31, 2018 USD ($) Y shares | Sep. 30, 2018 USD ($) shares | Dec. 31, 2019 USD ($) Y shares | Dec. 31, 2018 USD ($) Y | Feb. 12, 2018 $ / shares | Dec. 31, 2017 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Debt settlement |  |  |  |  |  | $ 477 |  |  |
Share price (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 15.60 |
Derivative asset (liability) |  |  |  | $ 62 |  |  | $ 62 |  |
Bridge Notes Redemption Feature [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Debt settlement |  |  |  |  |  | 438 |  |  |
Derivative asset (liability) |  |  |  | 30 |  |  | 30 |  |
Conversion Option [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Debt settlement |  |  |  |  |  | 39 |  |  |
Derivative asset (liability) |  |  |  | $ 32 |  |  | 32 |  |
Quarter 3 2018 Bridge Notes |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Derivative liabilities |  |  |  |  | $ 100 |  |  |  |
Derivative liability from debt discount |  |  |  |  | $ 100 |  |  |  |
April 2018 Bridge Notes |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Derivative liabilities |  |  | $ 300 |  |  |  |  |  |
Derivative liability from debt discount |  |  | $ 100 |  |  |  |  |  |
2016 Warrant Liability [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Warrants outstanding (in shares) | shares |  |  |  |  |  | 357 |  |  |
(Decrease) in warrant liability |  |  |  |  |  | $ (400) |  |  |
Warrants canceled in settlement agreement | shares |  |  |  |  |  | 1,347 |  |  |
Debt settlement |  |  |  |  |  |  | $ 456 |  |
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 |  |  |  |  |  | 140 |  |  |
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 |  |  |  |  |  | 1.59 |  |  |
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 |  |  |  |  |  | 1 |  |  |
April 2018 Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  |  | 243,224 |  |  |  |  |  |
Advisor Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  |  | 15,466 |  |  |  |  |  |
Quarter 3 2018 Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  |  |  |  | 196,340 |  |  |  |
Quarter 4 2018 Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  |  |  | 300,115 |  |  |  |  |
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 |  |  |  | 176 |  |  | 176 |  |
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 |  |  |  | 2.48 |  |  | 2.48 |  |
Quarter 4 2018 Warrants | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Expected term |  |  |  |  |  |  | 2 years |  |
April 2019 Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  | 147,472 |  |  |  |  |  |  |
May 2019 Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares | 154,343 |  |  |  |  |  |  |  |
Minimum | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 141 |  |  |
Minimum | 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 |  |  |  |  |  | 1.58 |  |  |
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 |  |  |  | 85 |  |  | 85 |  |
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 |  |  |  | 2.45 |  |  | 2.45 |  |
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 |  |  |  | 0.3 |  |  | 0.3 |  |
Minimum | April 2019 Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Expected term |  |  |  |  |  | 2 years 3 months 18 days |  |  |
Maximum | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 163 |  |  |
Maximum | 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 |  |  |  |  |  | 1.65 |  |  |
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 |  |  |  | 162 |  |  | 162 |  |
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 |  |  |  | 2.63 |  |  | 2.63 |  |
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 |  |  |  | 5.0 |  |  | 5.0 |  |
Maximum | April 2019 Warrants |  |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |
Expected term |  |  |  |  |  | 4 years 4 months 24 days |  |  |

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