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(6) Inventories (Tables)
3 Months Ended
Mar. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
     March 30,      December 29,  
     2019      2018  
Raw materials  $707,288   $706,982 
Work in process   2,233,664    2,248,370 
Finished goods   633,001    693,943 
Gross inventory   3,573,953    3,649,295 
           
Reserve for obsolescence   (496,362)   (456,362)
Inventories, net  $3,077,591   $3,1921,933