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Net Loss Per Common Share (Tables)
3 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
Schedule of common stock equivalents excluded from the computation of diluted net loss per share
 
    Three months ended
March 31,
 
    2016     2015  
Weighted average shares outstanding:                
Common stock warrants     573,111       359,714  
Options     1,984,578       717,548  
Total     2,557,689       1,077,262