Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Income Statement [Abstract]
Product sales	$ 5,758,015	$ 6,366,951	$ 12,269,586	$ 11,636,489
Cost of product sales	4,574,686	5,191,964	9,536,047	10,302,078
Gross Margin	1,183,329	1,174,987	2,733,539	1,334,411
Selling, general, and administrative expense	852,773	917,079	1,781,362	1,820,765
Income (loss) from operations	330,556	257,908	952,176	(486,354)
Interest income (expense), net	(31,325)	(7,310)	(51,291)	(7,261)
Net income (loss) before income tax	299,231	250,598	900,885	(493,615)
Income tax provision (benefit)
Net income (loss)	$ 299,231	$ 250,598	$ 900,885	$ (493,615)
Net income (loss) per basic common share	$ .02	$ 0.02	$ 0.07	$ (0.04)
Weighted average number of basic common shares outstanding	13,207,436	13,206,069	13,207,436	13,206,756
Net income (loss) per diluted common share	$ 0.03	$ 0.02	$ 0.07	$ (0.04)
Weighted average number of diluted common shares outstanding	13,259,783	13,260,261	13,253,457	13,206,756