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Loss Per Share
3 Months Ended
Mar. 31, 2020
Loss Per Share
7. Loss Per Share
Basic net loss per common share is computed by dividing the net loss available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per common share is computed by dividing the net loss available to common stockholders by the weighted average number of common shares and other potential common shares then outstanding. Potential common shares consist of common shares issuable upon the assumed exercise of
in-the-money
stock options and warrants and potential common shares related to the conversion of the preferred stock. The computation of diluted net loss per share does not assume the issuance of common shares that have an anti-dilutive effect on net loss per share.
Dilutive shares which could exist pursuant to the exercise of outstanding stock instruments and which were not included in the calculation because their affect would have been anti-dilutive are as follows:
 
   March 31, 2020
(shares)
   March 31, 2019
(shares)
 
Warrants to purchase shares of common stock
   12,538,204    10,418,525 
Options to purchase shares of common stock
   3,737,575    3,071,044 
Shares of common stock issuable upon conversion of preferred stock
   514,602    514,602 
  
 
 
   
 
 
 
   16,790,381    14,004,171