(6) Inventories - Inventories (Details) - USD ($)	Mar. 28, 2020	Dec. 28, 2019
Inventory Disclosure [Abstract]
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

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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