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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2015
Summary of Significant Accounting Policies  
Schedule of antidilutive shares excluded from computation of diluted net loss per share
    March 31, 
2014
    March 31, 
2015
 
Stock options     947,602       1,231,954  
Restricted Stock and Restricted Stock Units     119,248        
Convertible preferred stock     20,381       20,381  
Common stock warrants     1,440,022       1,138,630  
Total shares excluded from calculation     2,527,253       2,390,965