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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2014
Summary of Significant Accounting Policies  
Schedule of antidilutive shares excluded from computation of diluted net loss per share

 

   

Year Ended

December 31,

2013

   

Year Ended

December 31,

2014

 
Stock options     949,685       1,010,298  
Restricted Stock Units     119,248       89,016  
Convertible preferred stock     20,381       20,381  
Common stock warrants     1,591,795       1,341,129  
Total shares excluded from calculation     2,618,109       2,460,824