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(6) Inventories (Tables)
3 Months Ended
Mar. 28, 2020
Inventory Disclosure [Abstract]  
Inventories
     March 28,      December 28,  
     2020      2019  
Raw materials  $818,501   $778,409 
Work in process   2,005,211    1,898,916 
Finished goods   1,220,988    871,861 
Gross inventory   4,044,700    3,549,186 
           
Reserve for obsolescence   (449,362)   (449,362)
Inventories, net  $3,595,338   $3,099,824