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Inventories (Tables)
6 Months Ended
Jun. 29, 2019
Inventories [Abstract]  
Components of Inventories
Inventories consist of the following components:

  
June 29, 2019
  
December 29, 2018
 
       
Raw material and component parts
 
$
16,657,441
  
$
17,841,166
 
Work in process
  
8,365,711
   
8,960,202
 
Finished goods
  
24,248,661
   
25,971,841
 
Total inventories
 
$
49,271,813
  
$
52,773,209