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Note 6 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Total $ 37,635 $ 38,107
Gross Unrealized Gains 199 53
Gross Unrealized Losses 978 1,687
Fixed maturities, at fair value (amortized cost of $37,635 and $38,107, respectively) 36,856 36,473
US Government Agencies Debt Securities [Member]    
Total 12,872 13,384
Gross Unrealized Gains 77 8
Gross Unrealized Losses 182 395
Fixed maturities, at fair value (amortized cost of $37,635 and $38,107, respectively) 12,767 12,997
US States and Political Subdivisions Debt Securities [Member]    
Total 2,843 2,885
Gross Unrealized Gains 9 3
Gross Unrealized Losses 62 105
Fixed maturities, at fair value (amortized cost of $37,635 and $38,107, respectively) 2,790 2,783
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]    
Total 10,010 9,724
Gross Unrealized Gains 59 23
Gross Unrealized Losses 322 494
Fixed maturities, at fair value (amortized cost of $37,635 and $38,107, respectively) 9,747 9,253
Asset-Backed Securities [Member]    
Total 1,328 1,254
Gross Unrealized Gains 8 1
Gross Unrealized Losses 22 45
Fixed maturities, at fair value (amortized cost of $37,635 and $38,107, respectively) 1,314 1,210
Corporate Debt Securities [Member]    
Total 10,582 10,860
Gross Unrealized Gains 46 18
Gross Unrealized Losses 390 648
Fixed maturities, at fair value (amortized cost of $37,635 and $38,107, respectively) $ 10,238 $ 10,230