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Note 7 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Total $ 38,107 $ 40,127
Gross Unrealized Gains 53 2
Gross Unrealized Losses 1,687 2,538
Fixed maturities, at fair value (amortized cost of $38,107 and $40,127, respectively) 36,473 37,591
Total, estimated fair value 36,473 37,591
US Government Agencies Debt Securities [Member]    
Total 13,384 15,797
Gross Unrealized Gains 8 0
Gross Unrealized Losses 395 717
Fixed maturities, at fair value (amortized cost of $38,107 and $40,127, respectively) 12,997 15,080
Total, estimated fair value 12,997 15,080
US States and Political Subdivisions Debt Securities [Member]    
Total 2,885 2,390
Gross Unrealized Gains 3 0
Gross Unrealized Losses 105 158
Fixed maturities, at fair value (amortized cost of $38,107 and $40,127, respectively) 2,783 2,232
Total, estimated fair value 2,783 2,232
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Total 9,724 9,058
Gross Unrealized Gains 23 1
Gross Unrealized Losses 494 647
Fixed maturities, at fair value (amortized cost of $38,107 and $40,127, respectively) 9,253 8,412
Total, estimated fair value 9,253 8,412
Asset-Backed Securities [Member]    
Total 1,254 1,682
Gross Unrealized Gains 1 0
Gross Unrealized Losses 45 72
Fixed maturities, at fair value (amortized cost of $38,107 and $40,127, respectively) 1,210 1,610
Total, estimated fair value 1,210 1,610
Corporate Debt Securities [Member]    
Total 10,860 11,200
Gross Unrealized Gains 18 1
Gross Unrealized Losses 648 944
Fixed maturities, at fair value (amortized cost of $38,107 and $40,127, respectively) 10,230 10,257
Total, estimated fair value $ 10,230 $ 10,257