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Note 10 - Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 27, 2025
Dec. 28, 2024
Dec. 30, 2023
Balance at beginning of year $ 33,765 $ 35,900 $ 33,368
Additions for tax positions of current year 947 858 899
Additions/(Reductions) for tax positions of prior years (1,096) (788)  
Additions/(Reductions) for tax positions of prior years     1,802
Reductions due to lapse of the statute of limitations (1,492) (2,089) (295)
Reductions due to settlements (1,833) 0 0
Foreign exchange rate impact 129   126
Foreign exchange rate impact   (116)  
Balance at end of year $ 30,420 $ 33,765 $ 35,900