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Note 7 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Total | $ 38,117 | $ 38,107
Gross Unrealized Gains | 34 | 53
Gross Unrealized Losses | 1,188 | 1,687
Fixed maturities, at fair value (amortized cost of $38,117 and $38,107, respectively) | 36,963 | 36,473
US Government Agencies Debt Securities [Member] |  |
Total | 13,561 | 13,384
Gross Unrealized Gains | 11 | 8
Gross Unrealized Losses | 218 | 395
Fixed maturities, at fair value (amortized cost of $38,117 and $38,107, respectively) | 13,354 | 12,997
US States and Political Subdivisions Debt Securities [Member] |  |
Total | 2,846 | 2,885
Gross Unrealized Gains | 2 | 3
Gross Unrealized Losses | 73 | 105
Fixed maturities, at fair value (amortized cost of $38,117 and $38,107, respectively) | 2,775 | 2,783
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] |  |
Total | 10,309 | 9,724
Gross Unrealized Gains | 10 | 23
Gross Unrealized Losses | 433 | 494
Fixed maturities, at fair value (amortized cost of $38,117 and $38,107, respectively) | 9,886 | 9,253
Asset-Backed Securities [Member] |  |
Total | 1,346 | 1,254
Gross Unrealized Gains | 2 | 1
Gross Unrealized Losses | 22 | 45
Fixed maturities, at fair value (amortized cost of $38,117 and $38,107, respectively) | 1,326 | 1,210
Corporate Debt Securities [Member] |  |
Total | 10,055 | 10,860
Gross Unrealized Gains | 9 | 18
Gross Unrealized Losses | 442 | 648
Fixed maturities, at fair value (amortized cost of $38,117 and $38,107, respectively) | $ 9,622 | $ 10,230

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