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Note 13 - Significant Customers - Concentration of Risk by Customer (Details) - Customer Concentration Risk [Member]
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Accounts Receivable [Member] | United States Government Agencies [Member]    
Concentration Risk, Percentage 48.00%  
Accounts Receivable [Member] | Customer A [Member]    
Concentration Risk, Percentage   24.00%
Accounts Receivable [Member] | Customer B [Member]    
Concentration Risk, Percentage   15.00%
Revenue Benchmark [Member] | United States Government Agencies [Member]    
Concentration Risk, Percentage 29.00% 38.00%
Revenue Benchmark [Member] | Customer A [Member]    
Concentration Risk, Percentage 13.00%  
Revenue Benchmark [Member] | Customer B [Member]    
Concentration Risk, Percentage   13.00%