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Note H - Inventory
12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Inventory Disclosure [Text Block]
NOTE H
INVENTORY
 
Inventory is stated at the lower of cost, determined on a
first
in,
first
out basis, or realizable value, and consists primarily of fabricated assemblies and finished goods. Inventory is comprised of the following as of
December 31: 
 
   
2020
   
2019
 
                 
Finished goods
  $
221,130
    $
287,761
 
Fabricated assemblies
   
109,817
     
141,358
 
Total inventory
  $
330,947
    $
429,119