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STOCKHOLDERS' EQUITY (Preferred Stock Induced Conversions) (Details) - USD ($) |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 21, 2018 | Feb. 12, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Nov. 29, 2018 | Mar. 12, 2018 | Aug. 25, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 15,000,000 | 15,000,000 |  |  |
Preferred stock, par value (in dollars per share) |  |  | $ 0.01 | $ 0.01 |  |  |
Number of shares converted from debt instrument (in shares) |  | 120,983 |  |  |  |  |
Conversion of convertible debt plus interest into common stock |  | $ 1,900,000 | $ 7,553,000 | $ 2,356,000 |  |  |
Deemed dividend |  |  | $ 0 | $ 4,222,000 |  |  |
Warrants exercised |  |  | 20,000 |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  | 47 | 47 |  |  |
Preferred stock, shares issued (in shares) |  |  | 47 | 47 |  |  |
2018 Inducement Agreement | Warrants After Conversion Price Reduction [Member] | Deemed Dividend F |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Warrants, fair value |  |  | $ 100,000 |  |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Shares not converted |  |  | 47 |  |  |  |
Preferred Stock [Member] | 2018 Inducement Agreement |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Conversion price (in dollars per share) |  |  |  |  |  | $ 11.25 |
Exercise price (in dollars per share) |  |  | $ 11.25 | $ 15.60 |  |  |
Preferred Stock [Member] | 2018 Inducement Agreement | Deemed Dividend F |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Shares converted, value |  |  | $ 1,100,000 |  |  |  |
Warrants, fair value |  |  | $ 1,200,000 |  |  |  |
Common Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares converted from debt instrument (in shares) |  |  | 310,200 | 252,486 |  |  |
Conversion of convertible debt plus interest into common stock |  |  | $ 7,600,000 | $ 2,400,000 |  |  |
Preferred Class B |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 6,900 | 6,900 |  |  | 6,900
Preferred stock, par value (in dollars per share) |  |  |  |  |  |  | $ 0.01
Number of shares converted (in shares) |  |  | 2,340 |  |  |  |
Preferred stock, shares outstanding (in shares) |  |  | 47 | 47 |  |  |
Preferred stock, shares issued (in shares) |  |  | 6,900 | 6,900 |  |  |
Preferred Class B | 2018 Inducement Agreement |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Conversion price (in dollars per share) |  |  | $ 11.25 |  | $ 2.25 |  |
Convertible Preferred Stock [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Exercise price (in dollars per share) | $ 11.25 |  | $ 11.25 |  |  |  |
Warrants Issued During Period, Maximum Allowed Percentage of Common Stock | 4.99% |  |  |  |  |  |
Convertible Preferred Stock [Member] | Preferred Stock Induced Conversions, First Investor [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Class of Warrant or Right, Warrants or Rights Exercised | 44,444 |  |  |  |  |  |
Convertible Preferred Stock [Member] | Preferred Stock Induced Conversions, Second Investor [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Issuance of warrants in conjunction with issuance of side agreement | $ 33,333 |  |  |  |  |  |

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