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(6) Inventories (Tables)
6 Months Ended
Jun. 29, 2019
Inventory Disclosure [Abstract]  
Inventories
    June 29,      December 28,  
     2019      2018  
               
Raw materials  $687,105   $706,982 
Work in process   1,838,555    2,248,370 
Finished goods   887,912    693,943 
                
Total inventory   3,413,572    3,649,295 
Reserve for obsolescence   (512,672)   (456,362)
                
Inventories, net  $2,900,900   $3,192,933