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FAIR VALUE (Narratives) (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2018 USD ($) shares | Mar. 31, 2019 USD ($) Y shares | Dec. 31, 2018 Y shares | Sep. 30, 2018 USD ($) shares | Dec. 31, 2018 USD ($) Y | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative liability from debt discount |  | $ 400 |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  | $ 62 | $ 0
Bridge Notes Redemption Feature [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  | 30 |
Conversion Option [Member] |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  | $ 32 |
Quarter 3 2018 Bridge Notes |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
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 |  |  |  |  | 357
(Decrease) in warrant liability |  | $ (400) |  |  | $ (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 |  | 142 |  |  |  |  |
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 |  | 2.27 |  |  |  |  |
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 |  | 1.75 |  |  |  |  |
April 2018 Warrants |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Stock rights issued (in shares) | shares | 243,223 |  |  |  |  |  |
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 |  |  |  | 196,337 |  |  |
Quarter 4 2018 Warrants |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  |  | 300,114 |  |  |  |
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 |  |  | 176.00 |  | 176.00 |  |
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] |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | Y |  |  | 2 |  | 2 |  |
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 |  | 97 |  |  |  |  |
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 |  | 2.21 |  |  |  |  |
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 |  | 0.05 |  |  |  |  |
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 |  | 163 |  |  |  |  |
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 |  | 2.44 |  |  |  |  |
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 |  | 4.76 |  |  |  |  |

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