Note 3 - Net Income (Loss) Per Common and Common Equivalent Share - Table of Both Basic and Diluted EPS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Sep. 25, 2021	Oct. 01, 2022	Sep. 25, 2021
Basic EPS Computation:
Net income	$ 987,865	$ 2,727,967	$ 1,862,409	$ 2,998,067
Weighted average Common shares Outstanding (in shares)	14,434,468	14,324,136	14,417,995	13,963,563
Basic EPS (in dollars per share)	$ 0.07	$ 0.19	$ 0.13	$ 0.21
Diluted EPS Computation:
Net income	$ 987,865	$ 2,727,967	$ 1,862,409	$ 2,998,067
Weighted average Common shares Outstanding (in shares)	14,434,468	14,324,136	14,417,995	13,963,563
Dilutive effect of stock options (in shares)	252,008	487,124	265,637	578,793
Total Shares (in shares)	14,686,476	14,811,259	14,683,632	14,542,356
Diluted EPS (in dollars per share)	$ 0.07	$ 0.18	$ 0.13	$ 0.21