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Note 5 - Business Segment Reporting (Details Textual)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Number of Reportable Segments 4    
Customer Concentration Risk [Member] | Revenue Benchmark [Member]      
Number of Major Customers 1 0 0
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member]      
Concentration Risk, Percentage 12.50%