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Note F - Inventory (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
201
8
   
201
7
 
Current
 
 
 
 
 
 
 
 
Finished goods
   
496,358
     
487,858
 
Fabricated assemblies
   
502,471
     
458,989
 
Total current inventory
  $
998,829
    $
946,847