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Note 10 - Provision for Taxes - Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 25, 2021
Dec. 26, 2020
Income tax at statutory rate $ 4,749 $ 6,415 $ 6,914
Increase (decrease) in income tax resulting from      
State tax expense, net of federal effect 773 724 668
Federal true-ups (49) (38) (103)
Federal tax credits (413) (251) (114)
Captive insurance earnings (478) (456) (443)
Incentive stock options (18) (214) (4)
Other 61 (36) 70
Income Tax Expense (Benefit) $ 4,625 $ 6,144 $ 6,988