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Note H - Patents (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   
December 31, 2020
  
   
Cost
    
Accumulated Amortization
    
Net
  
Patents-foundation intellectual property
   $
1,377,863
     $
(1,048,614
 )   $
329,249
  
Total
   $
1,377,863
     $
(1,048,614
 )   $
329,249
  
   
December 31, 2019
  
   
Cost
    
Accumulated Amortization
    
Net
  
Patents-foundation intellectual property
   $
1,377,863
     $
(995,603
 )   $
382,260
  
Total
   $
1,377,863
     $
(995,603
 )   $
382,260