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Note 5 - Share Based Compensation (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
   

Three Months Ended June 30,

 
   

2024

   

2023

 
                 

Selling, general and administrative

  $ 39,383     $ 59,966  

Research, development and engineering

    9,388       17,430  
    $ 48,771     $ 77,396  
   

Six Months Ended June 30,

 
   

2024

   

2023

 
                 

Selling, general and administrative

  $ 87,025     $ 115,419  

Research, development and engineering

    18,539       33,352  
    $ 105,564     $ 148,771