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LONG-TERM DEBT AND CONVERTIBLE NOTES (Convertible Notes) (Details) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 17, 2018 USD ($) item $ / shares | Apr. 30, 2018 USD ($) $ / shares shares | Sep. 30, 2018 USD ($) item $ / shares shares | Sep. 30, 2018 USD ($) $ / shares shares | Sep. 30, 2017 USD ($) | Sep. 20, 2018 $ / shares | Sep. 19, 2018 $ / shares | Aug. 31, 2018 USD ($) $ / shares | Jul. 31, 2018 USD ($) | Jun. 30, 2018 USD ($) | Apr. 20, 2018 USD ($) | Dec. 31, 2017 USD ($) $ / shares | Aug. 31, 2017 $ / shares
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 1,689,000 | $ 1,689,000 |  |  |  |  |  |  |  | $ 3,416,000 |
Proceeds from convertible notes |  |  |  | 3,000,000 | $ 1,365,000 |  |  |  |  |  |  |  |
Warrant revaluation and modification |  |  |  | (617,000) | $ 3,000 |  |  |  |  |  |  |  |
Payments of financial advisor fees |  | $ 116,000 |  |  |  |  |  |  |  |  |  |  |
Derivative liability from debt discount |  |  | $ 100,000 | $ 100,000 |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  | 9,261,896 | 9,261,896 |  |  |  |  |  |  |  |  |
Original debt amount |  |  |  | $ 456,000 |  |  |  |  |  |  |  |  |
Long-term debt exchanged for convertible notes |  |  |  | 2,108,000 |  |  |  |  |  |  |  |  |
Derivative asset (liability) |  |  | $ (337,000) | (337,000) |  |  |  |  |  | $ (143,000) |  | $ 0 |
Convertible Bridge Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional drawdowns completed | item |  |  | 3 |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |
Net debt issuance costs and debt discounts |  |  | 3,100,000 | 3,100,000 |  |  |  |  |  |  |  |  |
Quarter 3 2018 Bridge Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  | 600,000 |  |  |  |  |  |  |  |  |  |
Derivative liability from debt discount |  |  | $ 100,000 | $ 100,000 |  |  |  |  |  |  |  |  |
Note Agreement 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  | $ 3,296,703 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  | $ 0.30 |  |  |  |  |  |  |  |  |  |  |
Convertible Promissory Note Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 1.40 | $ 3.00
Convertible Promissory Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares | $ 1.00 |  |  |  |  |  |  |  |  |  |  |  |
Conversion ratio | 1.65 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold trading days | item | 5 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal outstanding | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term | 18 months |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt exchanged for convertible notes | $ 1,800,000 |  |  |  |  |  |  |  |  |  |  |  |
Convertible Promissory Notes [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | 500,000 |  |  |  |  |  |  |  |  |  |  |  |
April 2018 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  | $ 0.75 | $ 0.75 | $ 0.75 |  | $ 0.50 | $ 0.75 |  |  |  |  |  |
Conversion ratio |  | 1.5 |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  | $ 1,100,000 |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  | 3,648,352 | 2,945,055 |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  | $ 1,100,000 | $ 700,000 | $ 700,000 |  |  |  |  |  |  |  |  |
Warrant revaluation and modification |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |
Advisor fees as a percentage of proceeds |  | 7.00% |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  | $ 0.75 | $ 0.50 | $ 0.50 |  |  |  |  |  |  |  |  |
April 2018 Warrants, First Half [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, term |  |  | 5 years | 5 years |  |  |  |  |  |  |  |  |
April 2018 Warrants, First Half [Member] | Note Agreement 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, term |  |  | 1 year |  |  |  |  |  |  |  |  |  |
April 2018 Warrants, Second Half [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, term |  |  | 1 year | 1 year |  |  |  |  |  |  |  |  |
April 2018 Warrants, Second Half [Member] | Note Agreement 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, term |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Advisor Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of warrant or right, term |  |  | 4 years |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  | $ 0.75 |  |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  | 232,000 |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
Advisor Warrants [Member] | Note Agreement 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  | 232,000 |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  | $ 0.75 |  |  |  |  |  |  |  |  |  |  |
Quarter 3 2018 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares |  |  | 2,945,055 |  |  |  |  |  |  |  |  |  |
Quarter 3 2018 Warrants [Member] | Quarter 3 2018 Bridge Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 1,786,000 | $ 1,786,000 |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  | 8.00% | 8.00% |  |  |  |  |  |  |  |  |
Discount percentage |  |  | 9.00% |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  | $ 0.50 | $ 0.50 |  |  |  |  |  |  |  |  |
Convertible debt, threshold consecutive trading days | item |  |  | 10 |  |  |  |  |  |  |  |  |  |
Conversion threshold percentage of stock price trigger |  |  | 80.00% |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 1,500,000 | $ 1,500,000 |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  | 1,300,000 |  |  |  |  |  |  |  |  |  |
Early repayment trigger, amount of gross proceeds |  |  | $ 7,000,000 |  |  |  |  |  |  |  |  |  |
Percentage per month charged as damages if registration statement not filed by deadline |  |  | 1.00% |  |  |  |  |  |  |  |  |  |
Debt discount |  |  | $ 164,000 | 164,000 |  |  |  |  |  |  |  |  |
Debt issuance costs, net |  |  | 164,000 | 164,000 |  |  |  |  |  |  |  |  |
Beneficial conversion feature |  |  | 1,100,000 |  |  |  |  |  |  |  |  |  |
Net debt issuance costs and debt discounts |  |  | 2,700,000 | 2,700,000 |  |  |  |  |  |  |  |  |
Debt discount and debt issuance costs as a reduction of the related debt |  |  | 1,800,000 | 1,800,000 |  |  |  |  |  |  |  |  |
Loss on issuance of convertible notes |  |  | 900,000 |  |  |  |  |  |  |  |  |  |
Amortization od debt discount |  |  | $ 59,000 | $ 68,000 |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  |  |  | 105.00% |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  |  |  | 110.00% |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan [Member] | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  |  |  | 115.00% |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  | $ 0.30 | $ 0.30 |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  |  | 1 year |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | April 2018 Bridge Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 1,824,176 | $ 1,824,176 |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  | 1,660,000 |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | July 2018 Bridge Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 348,104 |  |  |  |
Total debt |  |  |  |  |  |  |  |  | $ 382,526 |  |  |  |
Convertible Debt [Member] | August 2018 Bridge Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 495,955 |  |  |  |  |
Total debt |  |  |  |  |  |  |  | $ 545,005 |  |  |  |  |
Convertible Debt [Member] | September 2018 Bridge Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | 495,941 | 495,941 |  |  |  |  |  |  |  |  |
Total debt |  |  | 544,990 | 544,990 |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Quarter 3 2018 Bridge Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount |  |  | 133,000 | 133,000 |  |  |  |  |  |  |  |  |
Beneficial conversion feature |  |  | 500,000 |  |  |  |  |  |  |  |  |  |
Net debt issuance costs and debt discounts |  |  | 1,400,000 | 1,400,000 |  |  |  |  |  |  |  |  |
Debt discount and debt issuance costs as a reduction of the related debt |  |  | 1,300,000 | 1,300,000 |  |  |  |  |  |  |  |  |
Loss on issuance of convertible notes |  |  | 100,000 |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Quarter 3 2018 Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  | $ 700,000 | $ 700,000 |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  | 2,945,055 | 2,945,055 |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares |  |  | $ 0.50 | $ 0.50 |  |  |  | $ 0.75 |  |  |  |  |
Secured Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 1,058,000 | $ 1,058,000 |  |  |  |  |  |  |  | 3,233,000 |
Original debt amount | $ 2,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Bridge Notes Redemption Feature [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative asset (liability) |  |  | (116,000) | (116,000) |  |  |  |  |  | $ (143,000) |  | 0 |
Conversion Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative asset (liability) |  |  | $ (221,000) | $ (221,000) |  |  |  |  |  |  |  | $ 0 |

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