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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), Total $ 4,625 $ 6,144 $ 6,988