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Note 2 - Summary of Significant Accounting Policies - Concentration of Risk (Details) - Customer Concentration Risk [Member]
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Accounts Receivable [Member] | Company A [Member]          
Concentration Risk, Percentage     45.00%   57.00%
Accounts Receivable [Member] | Company B [Member]          
Concentration Risk, Percentage     23.00%   21.00%
Accounts Receivable [Member] | Company A and B [Member]          
Concentration Risk, Percentage     68.00%   78.00%
Revenue Benchmark [Member] | Company A [Member]          
Concentration Risk, Percentage 41.00% 43.00% 46.00% 44.00%  
Revenue Benchmark [Member] | Company B [Member]          
Concentration Risk, Percentage 26.00% 31.00% 27.00% 33.00%  
Revenue Benchmark [Member] | Company A and B [Member]          
Concentration Risk, Percentage 68.00% 74.00% 73.00% 77.00%