Note 7 - Earnings Per Share - Earnings Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Weighted average common shares outstanding (in shares)	13,714	13,572	13,747
Dilutive effect of stock options and restricted stock units (in shares)	190	117	119
Weighted average common shares outstanding, assuming dilution (in shares)	13,904	13,689	13,866