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Note 6 - Investments - Fixed Maturities by Contractual Maturity Periods (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Due in one year or less $ 6,273  
Due in one year or less, estimated fair value 6,175  
Due after one year through five years 25,670  
Due after one year through five years, estimated fair value 23,991  
Due after five years through ten years 1,363  
Due after five years through ten years, estimated fair value 1,213  
Due after ten years 4,996  
Due after ten years, estimated fair value 4,436  
Total 38,302 $ 40,127
Total, estimated fair value $ 35,815 $ 37,591