XML 20 R9.htm IDEA: XBRL DOCUMENT v3.21.1
3. Income (Loss) Per Common Share
 3 Months Ended
Mar. 31, 2021
Net loss per share of common stock:  
Income (Loss) Per Common Share

Basic earnings per share is calculated by dividing net income (loss) available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated based on the weighted average number of common shares outstanding during the period plus the effect of potentially dilutive common stock equivalents, including warrants to purchase the Company's common stock and convertible preferred stock.

 

At March 31, 2021 and 2020, the potentially dilutive common stock equivalents not included in the calculation of diluted earnings per share as their effect would have been anti-dilutive are as follows:

 

   

March 31,

2021

    

March 31,

2020

  
Warrants     2,471,089       452,041  
Convertible preferred stock     1,751,005       1,751,005  
Total possible dilution     4,222,094       2,203,046