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Net Loss per Share
6 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Net Loss per Share
5. Net Loss per Share
Basic net loss per share is computed by dividing net loss by the weighted average number of shares of common stock outstanding for the period. The Company’s potentially dilutive shares, which include outstanding common stock options, unvested restricted stock and preferred stock, have not been included in the computation of diluted net loss per share for any of the periods presented as the result would be anti-dilutive. Such potentially dilutive shares of common stock at June 30, 2020 and 2019 consisted of the following:
 
     June 30,  
     2020      2019  
Stock options
     6,561,513        5,077,591  
Inducement stock options
     863,333        500,000  
Unvested restricted stock
     1,354,306        1,554,579  
Warrants
     22,272,727        18,939,394  
  
 
 
    
 
 
 
     31,051,879        26,071,564