(7) Inventories - Inventories (Details) - USD ($)	Jun. 26, 2021	Dec. 27, 2020	Dec. 26, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 1,363,413		$ 752,760
Work in process	2,203,222		2,800,226
Finished goods	858,955		592,640
Total inventory	4,425,590		4,145,626
Reserve for obsolescence	(436,155)		(436,155)
Inventories, net	$ 3,989,435	$ 3,709,471	$ 3,709,471

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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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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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