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3. Income (Loss) Per Common Share (Tables)
3 Months Ended
Mar. 31, 2021
Net loss per share of common stock:  
Antidilutive securities excluded from computation of earnings per share
   

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