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Note 12 - Commitments and Contingencies (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Sep. 28, 2025
Sep. 29, 2024
Dec. 31, 2024
Standard and Extended Product Warranty Accrual $ 848,000   $ 848,000   $ 850,000
Product Warranty Expense 103,000 $ 97,000 302,000 $ 306,000  
Inventories [Member]          
Purchase Obligation 31,862,000   31,862,000    
Purchase Obligation, to be Paid, Remainder of Fiscal Year $ 28,700,000   $ 28,700,000