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GENERAL INFORMATION (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  | 12 Months Ended |
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Jun. 19, 2018 USD ($) $ / shares shares | Jan. 04, 2017 $ / shares shares | Nov. 15, 2016 USD ($) $ / shares shares | Oct. 13, 2016 USD ($) $ / shares shares | Jul. 07, 2016 | Apr. 15, 2016 shares | Dec. 31, 2018 shares | Dec. 31, 2017 shares | Dec. 31, 2016 shares | Apr. 14, 2016 shares
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized (in shares) |  |  |  |  |  | 500,000,000 | 500,000,000 | 500,000,000 |  | 250,000,000
Preferred Stock, Shares Authorized |  |  |  |  |  | 100,000,000 |  |  |  |
Peter C. Georgiopoulos, Chairman of Board |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Warrants exercisable |  |  |  | 213,937 |  |  |  |  |  |
Peter C. Georgiopoulos, Chairman of Board | Restricted Stock |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Vested (in shares) |  |  |  | 68,581 |  |  |  |  |  |
Separation and release agreement | Peter C. Georgiopoulos, Chairman of Board |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Severance payment | $ |  |  |  | $ 500 |  |  |  |  |  |
Minimum | Peter C. Georgiopoulos, Chairman of Board |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Exercise price per share | $ / shares |  |  |  | $ 259.10 |  |  |  |  |  |
Maximum | Peter C. Georgiopoulos, Chairman of Board |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Exercise price per share | $ / shares |  |  |  | $ 341.90 |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Reverse stock split |  |  |  |  | 0.1 |  |  |  |  |
Issuance of stock (in shares) | 7,015,000 |  |  |  |  |  | 7,015,000 |  |  |
Share price (in dollars per share) | $ / shares | $ 16.50 |  |  |  |  |  |  |  |  |
Net proceeds | $ | $ 109,648 |  |  |  |  |  |  |  |  |
Common Stock | Minimum |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Reverse stock split |  |  |  |  |  | 0.04 |  |  |  |
Common Stock | Maximum |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Reverse stock split |  |  |  |  |  | 0.50 |  |  |  |
Period after which stock split is effective |  |  |  |  |  | 1 year |  |  |  |
Series A Preferred Stock |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Preferred stock outstanding (in shares) |  |  |  |  |  |  |  |  | 27,061,856 |
Series A Preferred Stock | Preferred Stock |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Issuance of stock (in shares) |  |  |  |  |  |  |  |  | 27,061,856 |
Common stock authorized for conversion of preferred stock |  | 27,061,856 |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  | $ 0.01 |  |  |  |  |  |  |  |
Preferred stock outstanding (in shares) |  | 27,061,856 |  |  |  |  |  |  |  |
Preferred stock converted into common stock |  | 27,061,856 |  |  |  |  |  | 27,061,856 |  |
Private placement | Series A Preferred Stock |  |  |  |  |  |  |  |  |  |
Summary of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |
Issuance of stock (in shares) |  |  | 27,061,856 |  |  |  |  |  |  |
Issuance of stock excluding services (in shares) |  |  | 25,773,196 |  |  |  |  |  |  |
Share price (in dollars per share) | $ / shares |  |  | $ 4.85 |  |  |  |  |  |  |
Additional shares issued as commitment fee (in shares) |  |  | 1,288,660 |  |  |  |  |  |  |
Net proceeds | $ |  |  | $ 120,789 |  |  |  |  |  |  |

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