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STOCK BASED COMPENSATION (Details 1) - Stock options - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Number of Options Outstanding      
Options outstanding at December 31, 2015 (in shares) 2,475,579    
Granted (in shares) 2,094,087 221,656  
Cancelled/forfeited (in shares) (48,368)    
Options outstanding at March 31, 2016 (in shares) 4,521,298   2,475,579
Unvested at March 31, 2016 (in shares) (3,490,075)    
Vested and exercisable at March 31, 2016 (in shares) 1,031,223    
Weighted Average Exercise Price Per Share      
Options outstanding at December 31, 2015 (in dollars per share) $ 6.05    
Granted (in dollars per share) 0.39    
Cancelled/forfeited (in dollars per share) 1.75    
Options outstanding at March 31, 2016 (in dollars per share) 3.47   $ 6.05
Unvested at March 31, 2016 (in dollars per share) 0.61    
Vested and exercisable at March 31, 2016 (in dollars per share) $ 13.15    
Weighted Average Remaining Contractual Term (Years)      
Options outstanding 6 years 4 months 24 days   8 years 1 month 2 days
Unvested at March 31, 2016 6 years 7 months 10 days    
Vested and exercisable at March 31, 2016 5 years 8 months 5 days    
Aggregate Intrinsic Value      
Options outstanding    
Unvested at March 31, 2016    
Vested and exercisable at March 31, 2016