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(6) Inventories (Tables)
6 Months Ended
Jun. 27, 2020
Inventory Disclosure [Abstract]  
Inventories
     June 27,      December 28,  
     2020      2019  
Raw materials  $941,757   $778,409 
Work in process   1,997,260    1,898,916 
Finished goods   1,383,213    871,861 
Total inventory   4,322,230    3,549,186 
           
Reserve for obsolescence   (449,362)   (449,362)
Inventories, net  $3,872,868   $3,099,824