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Note 4 - Segment Information - Customers Accounted for 10% or More of Revenue (Details) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Customer A [Member]        
Entity wide revenue major customers percentage 43.00% 43.00% 42.00% 41.00%
Customer B [Member]        
Entity wide revenue major customers percentage   16.00% 13.00% 15.00%
Customer C [Member]        
Entity wide revenue major customers percentage 11.00%   10.00% 15.00%