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Note 5 - Common Stock (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
   

Number of

Options

   

Weighted

Average

Exercise Price

Per

Share

 
                 

Outstanding at December 31, 2023

    134,145     $ 2.86  

Granted

    37,875       3.33  

Exercised

           

Forfeited and expired

           

Outstanding at March 31, 2024

    172,020     $ 3.10