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Note 7 - Investments - Gross Realized Gains and Losses on Available-for-sale Investments, Limited Liability Investment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Net realized gains $ 1,557 $ 761
Fixed Maturities [Member]    
Gross realized gains 71 9
Gross realized losses 0 (6)
Realized gains (losses) 71 3
Limited Liability Investments [Member]    
Realized gains (losses) 4 238
Limited Liability Investments, Fair Value [Member]    
Realized gains (losses) 1,369 481
Private Company Investments [Member]    
Realized gains (losses) $ 113 $ 39