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(5) Inventories - Inventories (Details) - USD ($)
Jul. 01, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 488,897 $ 398,994
Work in process 1,072,191 1,089,496
Finished goods 756,082 1,032,971
Gross inventory 2,317,170 2,521,461
Reserve for obsolescence (371,362) (550,500)
Inventories, net $ 1,945,808 $ 1,970,961