Note 10 - Provision for Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Income tax at statutory rate	$ 2,623	$ 4,749	$ 6,415
Increase (decrease) in income tax resulting from
State tax expense, net of federal effect	333	773	724
Federal true-ups	(53)	(49)	(38)
Federal tax credits	(405)	(413)	(251)
Captive insurance earnings	(112)	(478)	(456)
Incentive stock options	33	(18)	(214)
Other	245	61	(36)
Income Tax Expense (Benefit)	$ 2,664	$ 4,625	$ 6,144