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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2016
Accounting Policies [Abstract]  
Schedule of antidilutive shares excluded from computation of diluted net loss per share

 

    March 31,
2015
    March 31,
2016
 
Stock options     1,231,954       4,521,298  
Convertible preferred stock     20,381       20,381  
Common stock warrants     1,138,630       544,116  
Total shares excluded from calculation     2,390,965       5,085,795