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Note 6 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Total $ 37,723 $ 38,117
Gross Unrealized Gains 108 34
Gross Unrealized Losses 875 1,188
Fixed maturities, at fair value (amortized cost of $37,723 and $38,117, respectively) 36,956 36,963
US Government Agencies Debt Securities [Member]    
Total 13,589 13,561
Gross Unrealized Gains 46 11
Gross Unrealized Losses 129 218
Fixed maturities, at fair value (amortized cost of $37,723 and $38,117, respectively) 13,506 13,354
US States and Political Subdivisions Debt Securities [Member]    
Total 2,602 2,846
Gross Unrealized Gains 3 2
Gross Unrealized Losses 56 73
Fixed maturities, at fair value (amortized cost of $37,723 and $38,117, respectively) 2,549 2,775
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]    
Total 9,852 10,309
Gross Unrealized Gains 29 10
Gross Unrealized Losses 321 433
Fixed maturities, at fair value (amortized cost of $37,723 and $38,117, respectively) 9,560 9,886
Asset-Backed Securities [Member]    
Total 1,338 1,346
Gross Unrealized Gains 4 2
Gross Unrealized Losses 19 22
Fixed maturities, at fair value (amortized cost of $37,723 and $38,117, respectively) 1,323 1,326
Corporate Debt Securities [Member]    
Total 10,342 10,055
Gross Unrealized Gains 26 9
Gross Unrealized Losses 350 442
Fixed maturities, at fair value (amortized cost of $37,723 and $38,117, respectively) $ 10,018 $ 9,622