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Note 4 - Inventory
12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Inventory Disclosure [Text Block]
4.
  
 
INVENTORY
 
Inventory is valued at the lower of cost (
first
-in,
first
-out) or net realizable value and consist of the following:
 
   
December 31, 2020
   
December 31, 2019
 
                 
Raw materials and component parts
  $
3,897,133
    $
2,945,427
 
Work-in-process
   
3,449,252
     
2,800,699
 
Finished products
   
3,999,920
     
2,183,170
 
Total Inventory
   
11,346,305
     
7,929,296
 
Less: Inventory reserves
   
315,345
     
250,606
 
Net Inventory
  $
11,030,960
    $
7,678,690