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Note 8 - Loss Per Share (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Year Ended
December 31,

 
   

2021

   

2020

 

Numerator:

               

Net loss attributable to common shareholders per common share: basic and diluted calculation

  $ (19,657,174

)

  $ (26,438,684

)

                 

Denominator:

               

Weighted average common shares outstanding-basic

    54,876,044       11,950,154  

Effect of diluted stock options, warrants and preferred stock (1)

    -       -  

Weighted average common shares outstanding-diluted

    54,876,044       11,950,154  

Loss per common share-basic and diluted

  $ (0.36

)

  $ (2.21

)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   

Year Ended December 31,

 
   

2021

   

2020

 

Options

    1,062,871       1,013,547  

Warrants

    31,699,885       7,353,376  

Convertible debt

    -       1,107,544  

Preferred stock: Series B

    79,246       79,246