(3) Net Income Per Common and Common Equivalent Share - Table of both basic and diluted EPS (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Basic EPS Computation:
Net income (loss)	$ 239,198	$ 299,231	$ 270,101	$ 900,885
Weighted average Common shares Outstanding	13,982,177	13,207,436	13,783,276	13,207,436
Basic EPS	$ 0.02	$ 0.02	$ 0.02	$ 0.07
Diluted EPS Computation:
Net income (loss)	$ 239,198	$ 299,231	$ 270,101	$ 900,885
Weighted average Common shares Outstanding	13,982,177	13,207,436	13,783,276	13,207,436
Dilutive effect of stock options	$ 568,741	$ 52,347	$ 624,628	$ 46,021
Total Shares	14,550,918	13,259,783	14,407,904	13,253,457
Diluted EPS	$ 0.02	$ 0.02	$ 0.02	$ 0.07