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NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCK (Details 2) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share        
Weighted average number of securities excluded from calculation 282,456 201,328 285,106 201,854
Stock options        
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share        
Weighted average number of securities excluded from calculation 160,424 162,184 160,424 162,184
Restricted stock units        
Anti-dilutive Securities Excluded from Calculation of Earnings Per Share        
Weighted average number of securities excluded from calculation 122,032 39,144 124,682 39,670