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(6) Inventories (Tables)
3 Months Ended
Mar. 27, 2021
Inventory Disclosure [Abstract]  
Inventories
    March 27,      December 26,  
     2021      2020  
               
Raw materials  $831,480   $752,760 
Work in process   2,539,880    2,800,226 
Finished goods   695,947    592,640 
                
Gross inventory   4,067,307    4,145,626 
Reserve for obsolescence   (436,155)   (436,155)
                
Inventories, net  $3,631,152   $3,709,471