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CONVERTIBLE NOTES - Bridge Notes (Details) |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 29, 2018 USD ($) D $ / shares | Sep. 17, 2018 USD ($) $ / shares | Sep. 17, 2018 USD ($) D $ / shares | Sep. 17, 2018 USD ($) item $ / shares | Sep. 17, 2018 USD ($) $ / shares | Sep. 17, 2018 USD ($) $ / shares | Feb. 12, 2018 USD ($) shares | Oct. 03, 2017 $ / shares shares | Apr. 30, 2018 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) item $ / shares shares | Sep. 30, 2018 USD ($) item $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) | Nov. 30, 2018 $ / shares | Sep. 20, 2018 $ / shares | Sep. 19, 2018 $ / shares | Aug. 31, 2018 USD ($) $ / shares | Jul. 31, 2018 USD ($) | Apr. 20, 2018 USD ($) | Oct. 31, 2017 USD ($) | Aug. 31, 2017 USD ($) shares | Aug. 17, 2017 USD ($) | Jun. 29, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  |  |  | $ 3,850,000 | $ 1,365,000 |  |  |  |  |  |  |  |  |  |
Number of additional drawdowns completed | item |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  | $ 516,000 |  | 516,000 | 3,416,000 |  |  |  |  |  |  |  |  |  |
Debt discount |  |  |  |  |  |  |  |  |  | 1,100,000 |  | 1,100,000 |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 211,000
Warrant revaluation and modification |  |  |  |  |  |  |  |  |  |  |  | (1,918,000) | 226,000 |  |  |  |  |  |  |  |  |  |
Payments of financial advisor fees |  |  |  |  |  |  |  |  | $ 116,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  |  |  |  |  | 62,000 |  | 62,000 |  |  |  |  |  |  |  |  |  |  |
Debt premium on debt |  |  |  |  |  |  |  |  |  | $ 600,000 |  | 600,000 |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  | (2,903,000) |  |  |  |  |  |  |  |  |  |  |
Bridge Notes plus interest converted |  |  |  |  |  |  |  |  |  |  |  | 456,000 |  |  |  |  |  |  |  |  |  |  |
Number of shares converted from debt instrument (in shares) | shares |  |  |  |  |  |  | 1,814,754 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of debt into stock |  |  |  |  |  |  | $ 1,900,000 |  |  |  |  | $ 3,191,000 |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  |  |  |  |  |  |  |  | 13,763,608 |  | 13,763,608 |  |  |  |  |  |  |  |  |  |  |
Amortization of debt discount |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
Amortization of debt premium |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |
Wrote-off of debt discount with an offset to additional paid in capital |  |  |  |  |  |  |  |  |  |  |  | 210,000 |  |  |  |  |  |  |  |  |  |  |
Write-off debt derivative liability in conjunction with convertible note conversions |  |  |  |  |  |  |  |  |  |  |  | 301,000 |  |  |  |  |  |  |  |  |  |  |
Long-term debt, net of current maturities |  |  |  |  |  |  |  |  |  | $ 253,000 |  | 253,000 | $ 2,829,000 |  |  |  |  |  |  |  |  |  |
Bridge Notes Beneficial Conversion Features |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  |  |  |  |  | (15,000) |  | (15,000) |  |  |  |  |  |  |  |  |  |  |
Bridge Notes Redemption Feature [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative asset (liability) |  |  |  |  |  |  |  |  |  | $ 30,000 |  | $ 30,000 |  |  |  |  |  |  |  |  |  |  |
Convertible Promissory Note Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Term |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,000 |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 3.00 |  | $ 1.40 |  | $ 1.40 |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  |  |  |  |  |  | 10,000 |  |  |  |  |  |  |  |  |  |  |  |  | 10,000 |  |
April 2018 Warrants, First Half |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Term |  |  |  |  |  |  |  |  | 5 years |  | 5 years | 5 years |  |  |  |  |  |  |  |  |  |  |
April 2018 Warrants, Second Half |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Term |  |  |  |  |  |  |  |  | 1 year |  | 1 year | 1 year |  |  |  |  |  |  |  |  |  |  |
April 2018 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  | $ 0.75 |  |  |  |  |  | $ 0.50 | $ 0.75 |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  | $ 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares | shares |  |  |  |  |  |  |  |  | 3,648,352 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  | $ 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion ratio |  |  |  |  |  |  |  |  | 150 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0.75 |  | $ 0.50 |  |  |  |  |  |  |  |  |  |  |  |
Warrant revaluation and modification |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |
Advisor fees as a percentage of proceeds |  |  |  |  |  |  |  |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Advisor Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 | shares |  |  |  |  |  |  |  |  | 232,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible promissory notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 300,000,000,000 | $ 300,000,000,000 | $ 300,000,000,000 | $ 300,000,000,000 | $ 300,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible debt, threshold consecutive trading days | D |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  | $ 1.00 | $ 1.00 | $ 1.00 | $ 1.00 | $ 1.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold trading days | item |  |  | 5 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount |  | $ 400,000 | $ 400,000 | $ 400,000 | $ 400,000 | $ 400,000 |  |  |  | $ 100,000 |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
Conversion ratio |  |  |  |  | 1.65 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability from debt discount |  |  |  |  |  |  |  |  |  | 400,000 |  | $ 400,000 |  |  |  |  |  |  |  |  |  |  |
Number of shares converted from debt instrument (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 4,373,439 |  |  |  |  |  |  |  |  |  |  |
Conversion of debt into stock |  |  |  |  |  | 2,800,000 |  |  |  |  |  | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal outstanding |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wrote-off of debt discount with an offset to additional paid in capital |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |
Write-off debt derivative liability in conjunction with convertible note conversions |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |
Long-term debt, net of current maturities |  |  |  |  |  |  |  |  |  | 600,000 |  | 600,000 |  |  |  |  |  |  |  |  |  |  |
Convertible promissory notes | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 500,000,000,000 | $ 500,000,000,000 | $ 500,000,000,000 | $ 500,000,000,000 | $ 500,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of debt discount |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
Quarter 3 2018 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares | shares |  |  |  |  |  |  |  |  |  |  | 2,945,055 |  |  |  |  |  |  |  |  |  |  |  |
Quarter 4 2018 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares | shares |  |  |  |  |  |  |  |  |  | 4,501,712 |  |  |  |  |  |  |  |  |  |  |  |  |
2018 Note Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,296,703 |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0.30 |  |  |  |  | $ 0.15 |  |  |  |  |  |  |  |  |
2018 Note Agreement | April 2018 Warrants, First Half |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Term |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |
2018 Note Agreement | April 2018 Warrants, Second Half |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Term |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
2018 Note Agreement | Advisor Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) | shares | shares |  |  |  |  |  |  |  |  | 232,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0.75 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Bridge Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt premium on debt |  |  |  |  |  |  |  |  |  | $ 900,000 |  | $ 900,000 |  |  |  |  |  |  |  |  |  |  |
Write-off debt derivative liability in conjunction with convertible note conversions |  |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |
Convertible Bridge Loan | Quarter 4 2018 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  |  | $ 700,000 |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.36 |  | $ 0.36 |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  |  |  |  |  |  |  |  | 4,501,712 |  | 4,501,712 |  |  |  |  |  |  |  |  |  |  |
Warrants term |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Quarter 3 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability from debt discount |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |
Quarter 3 2018 Bridge Notes | Quarter 3 2018 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |  |
April 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional drawdowns completed | item |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability from debt discount |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarter 4 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional drawdowns completed | item |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  | $ 1,400,000 |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |  |
Debt discount and debt issuance costs as a reduction of the related debt |  |  |  |  |  |  |  |  |  | 1,100,000 |  | 1,100,000 |  |  |  |  |  |  |  |  |  |  |
Beneficial conversion feature |  |  |  |  |  |  |  |  |  | 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on issuance of convertible notes |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Write off of debt premium with an offset to additional paid in capital |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Quarter 4 2018 Bridge Notes | Amendment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  | $ 1,100,000 |  | 300,000 |  |  |  |  |  |  |  |  |  |  |
Number of additional drawdowns completed | item |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  | $ 1,200,000 |  | 1,200,000 |  |  |  |  |  |  |  |  |  |  |
Debt discount |  |  |  |  |  |  |  |  |  | 108,000 |  | 108,000 |  |  |  |  |  |  |  |  |  |  |
Quarter 4 2018 Bridge Notes | Amendment Agreement | Other current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 125,000 |  | $ 125,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  | 6.00% |  | 6.00% |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  | $ 4,377,000 |  | $ 4,377,000 |  |  |  |  |  |  |  | $ 41,666 |  | $ 143,041 |
Convertible Debt [Member] | Quarter 3 2018 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount and debt issuance costs as a reduction of the related debt |  |  |  |  |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  |  |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.50 |  |  |  |  |  | $ 0.75 |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  |  |  |  |  |  |  |  |  | 2,945,055 |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Quarter 4 2018 Warrants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, fair value |  |  |  |  |  |  |  |  |  | $ 700,000 |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.36 |  | $ 0.36 |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares |  |  |  |  |  |  |  |  |  | 4,501,712 |  | 4,501,712 |  |  |  |  |  |  |  |  |  |  |
Warrants term |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 1,800,000 |  | $ 1,800,000 |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  | 8.00% |  |  |  |  |  |  |  |  |  |  |  |
Discount percentage |  |  |  |  |  |  |  |  |  |  | 9.00% |  |  |  |  |  |  |  |  |  |  |  |
Conversion threshold percentage of stock price trigger |  |  |  |  |  |  |  |  |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
Convertible debt, threshold consecutive trading days | item |  |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.50 |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt discount and debt issuance costs as a reduction of the related debt |  |  |  |  |  |  |  |  |  | 1,800,000 |  | 1,800,000 |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs, net |  |  |  |  |  |  |  |  |  |  | $ 164,000 |  |  |  |  |  |  |  |  |  |  |  |
Beneficial conversion feature |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 |  |  |  |  |  |  |  |  |  |  |
Net debt issuance costs and debt discounts |  |  |  |  |  |  |  |  |  | 2,700,000 |  | 2,700,000 |  |  |  |  |  |  |  |  |  |  |
Loss on issuance of convertible notes |  |  |  |  |  |  |  |  |  |  |  | 900,000 |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Amendment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion threshold percentage of stock price trigger | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible debt, threshold consecutive trading days | D | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount | $ 3,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beneficial conversion feature | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net debt issuance costs and debt discounts |  |  |  |  |  |  |  |  |  | $ 5,600,000 |  | 5,600,000 |  |  |  |  |  |  |  |  |  |  |
Loss on issuance of convertible notes |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing amount | $ 1,318,681,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price above the closing bid price of common stock | $ / shares | $ 0.05 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Floor price | $ / shares | $ 0.15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, carrying amount | $ 3,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of convertible debt | 4,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt premium on debt | 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt | 2,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bridge Notes plus interest converted |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |  |  |  |  |  |  |  |  |
Number of shares converted from debt instrument (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 1,400,000 |  |  |  |  |  |  |  |  |  |  |
Write off of debt premium with an offset to additional paid in capital |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
Debt discounts written-off as a result of the extinguishment of certain Bridge Notes |  |  |  |  |  |  |  |  |  |  |  | $ 3,100,000 |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Amendment Agreement | Bridge Notes Beneficial Conversion Features |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beneficial conversion feature | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Amendment Agreement | Bridge Notes Redemption Feature [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative asset (liability) | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Debt Instrument, Redemption, Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  |  |  |  |  |  |  |  |  |  |  | 105.00% |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Debt Instrument, Redemption, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  |  |  |  |  |  |  |  |  |  |  | 110.00% |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Debt Instrument, Redemption, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage |  |  |  |  |  |  |  |  |  |  |  | 115.00% |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.30 |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Convertible Bridge Loan | Maximum | Amendment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price per share | $ / shares | $ 0.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability from debt discount | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | Quarter 3 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt discount and debt issuance costs as a reduction of the related debt |  |  |  |  |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt discount |  |  |  |  |  |  |  |  |  |  | 133,000 |  |  |  |  |  |  |  |  |  |  |  |
Beneficial conversion feature |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |
Derivative liability from debt discount |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |
Net debt issuance costs and debt discounts |  |  |  |  |  |  |  |  |  |  | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Loss on issuance of convertible notes |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | July 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 348,104 |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 382,526 |  |  |  |  |
Convertible Debt [Member] | August 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 495,955 |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 545,005 |  |  |  |  |  |
Convertible Debt [Member] | September 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  | 495,941 |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  |  | 544,990 |  |  |  |  |  |  |  |  |  |  |  |
Convertible Debt [Member] | April 2018 Bridge Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  |  |  |  |  |  | 1,660,000 |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  |  | 1,824,176 |  |  |  |  |  |  |  |  |  |  |  |
Debt discount and debt issuance costs as a reduction of the related debt |  |  |  |  |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Beneficial conversion feature |  |  |  |  |  |  |  |  | $ 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from write-off debt derivative liability in conjunction with convertible note conversions. + References No definition available. + Details
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- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from write-off debt discounts (net of debt premiums) in conjunction with convertible note conversions. + References No definition available. + Details
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- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from write-off debt premiums in conjunction with convertible note conversions. + References No definition available. + Details
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- Definition Class of Warrant or Right, Term + References No definition available. + Details
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- Definition Early Repayment Trigger Amount of Gross Proceeds + References No definition available. + Details
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- Definition Difference between the fair value of payments made and the carrying amount of convertible notes which is extinguished prior to maturity. + References No definition available. + Details
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- Definition Percentage per month charged as damages if registration statement not filed by deadline + References No definition available. + Details
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