Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Statement [Abstract]
Product sales	$ 4,452,387	$ 4,387,125	$ 16,721,973	$ 16,023,615
Total Revenues	4,452,387	4,387,125	16,721,973	16,023,615
Cost of product sales	3,514,813	4,164,187	13,050,860	14,466,266
Gross Margin	937,574	222,938	3,671,113	1,557,349
Selling, general and administrative expense	684,836	702,413	2,466,198	2,523,178
Operating income (loss)	252,738	(479,475)	1,204,915	(965,829)
Interest income (expense), net	(21,263)	(16,495)	(87,004)	(23,757)
Other income (expense), net	(3)		14,446
Net income (loss) before income tax expense	231,472	(495,970)	1,132,357	(989,586)
Income tax provision	456		456
Net income (loss)	$ 231,016	$ (495,970)	$ 1,131,901	$ (989,586)
Net income (loss) per basic common share	$ 0.02	$ (0.04)	$ 0.09	$ (0.07)
Weighted average number of basic common shares outstanding	13,288,652	13,206,069	13,234,508	13,206,984
Net income (loss) per diluted common share	$ 0.02	$ (0.04)	$ 0.09	$ (0.07)
Weighted average number of diluted common shares outstanding	13,456,486	13,206,069	13,320,915	13,206,984