Note 10 - Per Share Data - Weighted Average Number of Common Shares (Details) - shares	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Basic weighted average shares outstanding (in shares)	10,051,688	11,035,361	12,152,042
Dilutive effect of outstanding restricted share awards (in shares)	390,488	589,740	0
Weighted average dilutive shares outstanding (in shares)	10,442,176	11,625,101	12,152,042