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Note 13 - Information Concerning Product Lines, Geographic Information and Revenue Concentration - Customer and Distributor Concentration of Accounts Receivable (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]
9 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Distributor "A" [Member]    
Concentration risk percentage   10.00%
Distributor "D" [Member]    
Concentration risk percentage   12.00%
Customer "A" [Member]    
Concentration risk percentage 56.00% 50.00%
Customer "K" [Member]    
Concentration risk percentage   10.00%
Customer Q [Member]    
Concentration risk percentage 15.00%