Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Details 2)

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STOCK-BASED COMPENSATION (Details 2) - USD ($)
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Share-based Compensation, Stock Options, Activity [Line Items]    
Outstanding - Number of Shares Issuable Upon Exercise of Outstanding Options 719,466  
Granted - Number of Shares Issuable Upon Exercise of Outstanding Options 510,200  
Exercised - Number of Shares Issuable Upon Exercise of Outstanding Options 8,333  
Canceled - Number of Shares Issuable Upon Exercise of Outstanding Options 149,177  
Forfeited - Number of Shares Issuable Upon Exercise of Outstanding Options 283,773  
Outstanding - Number of Shares Issuable Upon Exercise of Outstanding Options 788,383  
Vested - Number of Shares Issuable Upon Exercise of Outstanding Options 253,556  
Unvested - Number of Shares Issuable Upon Exercise of Outstanding Options 534,827  
Exercisable - Number of Shares Issuable Upon Exercise of Outstanding Options 253,556  
Outstanding - Weighted Average Exercise Price (in dollars per share) $ 15.59  
Granted - Weighted Average Exercise Price (in dollars per share) 2.65 $ 7.40
Exercised - Weighted Average Exercise Price (in dollars per share) 2.74  
Canceled - Weighted Average Exercise Price (in dollars per share) 22.68  
Forfeited - Weighted Average Exercise Price (in dollars per share) 8.22  
Outstanding - Weighted Average Exercise Price (in dollars per share) 8.67  
Vested - Weighted Average Exercise Price (in dollars per share) 18.04  
Unvested - Weighted Average Exercise Price (in dollars per share) 3.04  
Exercisable - Weighted Average Exercise Price (in dollars per share) $ 18.04  
Vested - Weighted Average Remaining Contracted Term in Years 5 years 7 months 10 days  
Unvested - Weighted Average Remaining Contracted Term in Years 9 years 6 months 22 days  
Exercisable - Weighted Average Remaining Contracted Term in Years 5 years 7 months 10 days  
Vested - Aggregate Intrinsic Value (in dollars) $ 0  
Unvested - Aggregate Intrinsic Value (in dollars) 0  
Exercisable - Aggregate Intrinsic Value (in dollars) $ 0