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Note 9 - Per Share Data (Details Textual) - shares
shares in Thousands
9 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Dec. 28, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 0 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) 0   0