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Note 7 - Patents (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   

September 30, 2022

         
   

Cost

   

Accumulated Amortization

   

Net

 

Patents-foundation intellectual property

    1,377,863       (1,140,227 )     237,636  

Total

    1,377,863       (1,140,227 )     237,636  
   

December 31, 2021

         
   

Cost

   

Accumulated Amortization

   

Net

 

Patents-foundation intellectual property

    1,377,863       (1,100,244 )     277,619  

Total

    1,377,863       (1,100,244 )     277,619