Note 3 - Net Income Per Common and Common Equivalent Share - Table of Both Basic and Diluted EPS (Details) - USD ($)	3 Months Ended
	Apr. 02, 2022	Mar. 27, 2021
Basic EPS Computation:
Net income	$ 419,436	$ 30,903
Weighted average common shares outstanding (in shares)	14,389,857	13,584,376
Basic EPS (in dollars per share)	$ 0.03	$ 0.00
Diluted EPS Computation:
Net income	$ 419,436	$ 30,903
Weighted average common shares outstanding (in shares)	14,389,857	13,584,376
Dilutive effect of stock options (in shares)	268,082	680,514
Total Shares (in shares)	14,657,939	14,264,890
Diluted EPS (in dollars per share)	$ 0.03	$ 0.00