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Note H - Inventory (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
2020
   
2019
 
                 
Finished goods
  $
221,130
    $
287,761
 
Fabricated assemblies
   
109,817
     
141,358
 
Total inventory
  $
330,947
    $
429,119