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Note H - Leases (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Sep. 28, 2025
Sep. 29, 2024
Operating Lease, Payments $ 379,000 $ 373,000 $ 1,150,000 $ 1,122,000
Operating Lease, Weighted Average Remaining Lease Term (Year) 18 years 6 months   18 years 6 months  
Operating Lease, Weighted Average Discount Rate, Percent 4.70%   4.70%  
Operating Lease, Lease Income, Lease Payments $ 583,000 $ 569,000 $ 1,749,000 $ 1,689,000