(3) Net Income (Loss) Per Common Equivalent Share - Calculation of basic and diluted EPS (Details) - USD ($)	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Basic EPS Computation:
Net income (loss)	$ 601,654	$ (744,214)
Weighted average Common shares Outstanding	13,207,436	13,206,069
Basic EPS	$ 0.05	$ (0.06)
Diluted EPS Computation:
Net income (loss)	$ 601,654	$ (744,214)
Weighted average Common shares Outstanding	13,207,436	13,206,069
Dilutive effect of stock options	$ 39,695
Total Shares	13,247,131	13,206,069
Diluted EPS	$ 0.05	$ (0.06)