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Note 12 - Information Concerning Product Lines, Geographic Information and Revenue Concentration - Customer and Distributor Concentration of Accounts Receivable (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Customer "A" [Member]    
Concentration risk percentage 41.00% 86.00%
Customer "H" [Member]    
Concentration risk percentage 12.00%  
Customer "J" [Member]    
Concentration risk percentage 13.00%