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Note 6 - Net Income (Loss) Per Share (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Three Months Ended September 30,

   

Nine Months Ended September 30,

 
   

2025

   

2024

   

2025

   

2024

 

Numerator:

                               

Numerator for basic and diluted income (loss) per share, net income (loss) available to common shareholders

  $ (415,086 )   $ 2,851,267     $ (1,016,710 )   $ 2,676,572  

Denominator:

                               

Denominator for basic income (loss) per share, weighted average shares outstanding

    26,892,925       27,322,497       26,719,488       26,747,277  

Effect of dilutive securities

                       

Denominator for diluted earnings per share, adjusted for weighted average shares and assumed conversion

    26,892,925       27,322,497       26,719,488       26,747,277  

Basic income (loss) per common share

  $ (0.02 )   $ 0.10     $ (0.04 )   $ 0.10  

Diluted income (loss) per common share and common share equivalent

  $ (0.02 )   $ 0.10     $ (0.04 )   $ 0.10  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   

Nine Months Ended September 30,

 
   

2025

   

2024

 

Anti-dilutive warrants

    945,599       945,599