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Note 6 - Investments - Fixed Maturities by Contractual Maturity Periods (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Due in one year or less	$ 7,166
Due in one year or less, estimated fair value	7,110
Due after one year through five years	24,885
Due after one year through five years, estimated fair value	24,442
Due after five years through ten years	1,458
Due after five years through ten years, estimated fair value	1,440
Due after ten years	4,126
Due after ten years, estimated fair value	3,864
Total	37,635	$ 38,107
Total, estimated fair value	$ 36,856	$ 36,473

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