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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

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