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