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SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Weighted average exercise price, beginning of period (in dollars per share) $ 6.54 $ 10.05
Grants in period, weighted average exercise price (in dollars per share) 2.13 6.02
Exercises in period, weighted average exercise price (in dollars per share) 2.12 3.78
Forfeitures in period, weighted average exercise price (in dollars per share) 5.95 7.29
Expirations in period, weighted average exercise price (in dollars per share) 8.02 7.42
Weighted average exercise price, end of period (in dollars per share) $ 5.81 $ 6.54
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Number of options, beginning of period (in shares) 2,122,897 905,413
Number of grants in period, net of forfeitures (in shares) 449,540 2,176,330
Number of exercises in period (in shares) (8,369) (48,802)
Number of forfeitures in period (in shares) (272,528) (574,486)
Number of expirations in period (in shares) (106,562) (335,558)
Number of options, end of period (in shares) 2,184,978 2,122,897
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Weighted average exercise price, beginning of period (in dollars per share) $ 2.55 $ 6.55
Grants in period, weighted average exercise price (in dollars per share) 2.12 2.55
Exercises in period, weighted average exercise price (in dollars per share)   2.55
Forfeitures in period, weighted average exercise price (in dollars per share) 2.12 4.44
Expirations in period, weighted average exercise price (in dollars per share) 2.95 7.47
Weighted average exercise price, end of period (in dollars per share) 2.12 2.55
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Weighted average exercise price, beginning of period (in dollars per share) 32.10 38.12
Grants in period, weighted average exercise price (in dollars per share) 2.22 18.55
Exercises in period, weighted average exercise price (in dollars per share) 2.12 4.48
Forfeitures in period, weighted average exercise price (in dollars per share) 19.44 29.71
Expirations in period, weighted average exercise price (in dollars per share) 32.78 32.10
Weighted average exercise price, end of period (in dollars per share) $ 15.61 $ 32.10