Note 9 - Per Share Data - Weighted Average Number of Common Shares (Details) - shares	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Basic weighted average shares outstanding (in shares)	10,154,505	10,974,788	10,172,765	11,218,565
Dilutive effect of outstanding restricted share units (in shares)	367,653	450,826	394,051	446,539
Weighted average dilutive shares outstanding (in shares)	10,522,158	11,425,614	10,566,816	11,665,104