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STOCKHOLDERS' EQUITY (Series C Preferred Stock) (Details) - USD ($) |  | 1 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 02, 2017 | Aug. 31, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Apr. 30, 2018 | Feb. 28, 2018 | Dec. 31, 2017 | Nov. 30, 2017 | Nov. 06, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  |  | $ 0.01 |  |  |  | $ 0.01 |  |
Proceeds from Issuance of preferred stock |  |  |  | $ 400,000 |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 15,000,000 |  |  |  | 15,000,000 |  |
Preferred stock, shares outstanding (in shares) |  |  | 47 |  |  |  | 4,935 |  |
Preferred stock, shares issued (in shares) |  |  | 47 |  |  |  | 4,935 |  |
Offering Warrants |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) |  | 2,680,000 |  |  |  |  |  |  |
Exercise price (in dollars per share) |  | $ 3.00 | $ 0.75 |  | $ 0.30 | $ 1.04 |  | $ 1.40 |
Series C Preferred Stock |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.01
Warrants outstanding (in shares) |  |  |  |  |  |  |  | 1,962,857 |
Exercise price (in dollars per share) |  |  |  |  |  |  |  | $ 1.63 |
Warrant unit value (per unit) |  |  |  |  |  |  |  | $ 1,000 |
Number of shares converted (in shares) |  |  | 2,548 |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  |  | 2,748 |  |  |  |  |  | 2,748
Preferred stock, shares outstanding (in shares) |  |  | 0 |  |  |  |  |  |
Preferred stock, shares issued (in shares) |  |  | 0 |  |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share |  |  |  |  |  |  |  |  | $ 1,000
Common stock issued on conversion of preferred shares |  |  | 3,345,334 |  |  |  |  |  |
Placement Agreement [Member] | Series C Preferred Stock |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Shares sold in offering (in shares) | 2,748 |  |  |  |  |  |  |  |
Conversion price (in dollars per share) |  |  |  |  |  |  | $ 1.40 |  |
Purchase Agreement 2018 [Member] | Series C Preferred Stock |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Conversion price (in dollars per share) |  |  | $ 1.04 |  |  |  |  |  |
Beneficial conversion feature |  |  | $ 800,000 |  |  |  |  |  |

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