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Note 6 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Total $ 37,764 $ 38,117
Gross Unrealized Gains 221 34
Gross Unrealized Losses 585 1,188
Fixed maturities, at fair value (amortized cost of $37,764 and $38,117, respectively) 37,400 36,963
US Government Agencies Debt Securities [Member]    
Total 14,360 13,561
Gross Unrealized Gains 88 11
Gross Unrealized Losses 68 218
Fixed maturities, at fair value (amortized cost of $37,764 and $38,117, respectively) 14,380 13,354
US States and Political Subdivisions Debt Securities [Member]    
Total 1,788 2,846
Gross Unrealized Gains 3 2
Gross Unrealized Losses 27 73
Fixed maturities, at fair value (amortized cost of $37,764 and $38,117, respectively) 1,764 2,775
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]    
Total 10,079 10,309
Gross Unrealized Gains 68 10
Gross Unrealized Losses 250 433
Fixed maturities, at fair value (amortized cost of $37,764 and $38,117, respectively) 9,897 9,886
Asset-Backed Securities [Member]    
Total 1,227 1,346
Gross Unrealized Gains 10 2
Gross Unrealized Losses 13 22
Fixed maturities, at fair value (amortized cost of $37,764 and $38,117, respectively) 1,224 1,326
Corporate Debt Securities [Member]    
Total 10,310 10,055
Gross Unrealized Gains 52 9
Gross Unrealized Losses 227 442
Fixed maturities, at fair value (amortized cost of $37,764 and $38,117, respectively) $ 10,135 $ 9,622