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NET LOSS PER SHARE OF COMMON STOCK - Securities Excluded from Calculation of Weighted Average Shares Outstanding as their Effect is Antidilutive (Details) - shares
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Common Stock Options    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Securities outstanding excluded from the calculation of weighted average shares outstanding 3,997,650 3,569,298
Restricted Stock Units    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Securities outstanding excluded from the calculation of weighted average shares outstanding 194,600  
Common Stock Warrants    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Securities outstanding excluded from the calculation of weighted average shares outstanding 40,790 2,472,400