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STOCKHOLDERS' EQUITY (Common Stock Warrants) (Details) - $ / shares | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Class of Stock [Line Items] |  |
Class of stock warrants expired (shares) | 3,362,276 |
Common stock warrants issued (in shares) | 2,933,106 |
Underlying Shares |  | 3,334,011
Private Placement |  |
Class of Stock [Line Items] |  |
Common stock warrants issued (in shares) | 1,051,650 |
Offering |  |
Class of Stock [Line Items] |  |
Common stock warrants issued (in shares) | 1,881,456 |
Various Institutional Holders; January 2018 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 441,655
Exercise Price (in dollars per share) |  | $ 9
Affiliates of Third Security, LLC; January 2018 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 250,000
Exercise Price (in dollars per share) |  | $ 9
Various Institutional Holders; April 2020 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 374,618
Exercise Price (in dollars per share) |  | $ 4.00
Various Institutional Holders; February 2020 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 714,780
Exercise Price (in dollars per share) |  | $ 2.24
Various Institutional Holders; December 2020 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 122,433
Exercise Price (in dollars per share) |  | $ 1.66
Various Institutional Holders; January 2021 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 1,161,972
Exercise Price (in dollars per share) |  | $ 1.21
Affiliates of Third Security, LLC; January 2021 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 161,026
Exercise Price (in dollars per share) |  | $ 1.21
Various Institutional Holders; January 2021 |  |
Class of Stock [Line Items] |  |
Underlying Shares |  | 107,527
Exercise Price (in dollars per share) |  | $ 1.21

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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