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Note 5 - Share Based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three Months Ended March 31,

 
  

2024

  

2023

 
         

Selling, general and administrative

 $47,642  $55,453 

Research, development and engineering

  9,151   15,922 
  $56,793  $71,375