Statements of Operations - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Income Statement [Abstract]
Product sales	$ 21,468,414	$ 21,580,904
Cost of product sales	18,928,173	18,668,052
Gross margin	2,540,241	2,912,852
Selling, general, and administrative expenses	3,137,440	3,813,415
Income (loss) from operations	(597,199)	(900,563)
Other income (expense)	(35,547)	(20,985)
Income (loss) before income tax	(632,746)	(921,548)
Income tax provision (benefit)	5,456	2,784,419
Net income (loss)	$ (638,202)	$ (3,705,967)
Net income (loss) per basic common share	$ (0.05)	$ (0.28)
Weighted average number of basic common shares outstanding	13,207,097	13,205,936
Net income (loss) per diluted common share	$ (0.05)	$ (0.28)
Weighted average number of diluted common shares outstanding	13,207,097	13,205,396