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Note 3 - Investments - Net Realized and Unrealized Investment Gains and Losses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]      
Gains on sales of fixed maturity securities $ 605 $ 179 $ 89
Gains on sales of equity securities 104 20 0
Total realized gains 709 199 89
Losses on sales of fixed maturity securities (768) (2,489) (32)
Losses on sales of equity securities (105) 0 0
Total realized losses (873) (2,489) (32)
Net realized investment gains (losses) (164) (2,290) 57
Change in allowance for credit losses 244 659 (667)
Net unrealized gains (losses) on equity securities 8,021 6,161 3,933
Net unrealized losses on equity method investment 2,268 (340) (382)
Net unrealized gains on other investments 1,462 378  
Net realized and unrealized gains (losses) on investments $ 11,831 $ 4,568 $ 2,941