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(7) Inventories (Tables)
6 Months Ended
Jun. 26, 2021
Inventory Disclosure [Abstract]  
Inventories
    June 26,      December , 26  
     2021     2020  
               
Raw materials  $1,363,413   $752,760 
Work in process   2,203,222    2,800,226 
Finished goods   858,955    592,640 
                
Total inventory   4,425,590    4,145,626 
Reserve for obsolescence   (436,155)   (436,155)
                
Inventories, net  $3,989,435   $3,709,471