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Note 3 - Investments - Net Investment Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Investment income $ 135 $ 32
Cash and Cash Equivalents [Member]    
Investment income 80 93
Fixed Income Securities [Member]    
Investment income 0 1
Partnership [Member]    
Investment income $ 55 $ (62)