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Note 9 - Net Loss Per Share
3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Earnings Per Share [Text Block]
NOTE
9:
NET LOSS PER SHARE
 
Basic net loss per common share is computed by dividing net loss attributable to common stockholders by the weighted average number of common shares outstanding. In addition, in computing the dilutive effect of convertible securities, the numerator is adjusted to add back any convertible preferred dividends. Diluted net loss per common share is computed by dividing net loss attributable to common stockholders by the weighted average number of common shares that would have been outstanding during the period assuming the issuance of common shares for all potential dilutive common shares outstanding. Potential common shares consist of potential future exercises of outstanding stock options and common stock warrants. Because the inclusion of potential common shares would be anti-dilutive for all periods presented, they have been excluded from the calculation.
 
The following table summarizes the Company’s calculation of net loss per common share: 
 
   
Three Months Ended March 31,
 
   
2020
   
2019
 
Numerator
 
 
 
 
 
 
 
 
Net loss attributable to common shareholders
  $
(2,947,420
)   $
(4,073,307
)
Denominator
 
 
 
 
 
 
 
 
Weighted average common shares outstanding used to compute net loss per share, basic and diluted
   
9,130,984
     
6,565,514
 
Net loss per share of common stock, basic and diluted:
  $
(0.32
)   $
(0.62
)
 
The following table sets forth the number of potential common shares excluded from the calculation of net loss per diluted share, because including them would be anti-dilutive: 
 
   
Three Months Ended March 31,
 
   
2020
   
2019
 
Options to purchase common stock
   
4,308,383
     
783,383
 
Series B convertible preferred stock
   
190,617
     
458,994
 
Warrants to purchase common stock
   
1,070,028
     
3,369,468
 
     
5,569,028
     
4,611,845