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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

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