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Note 6 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Total $ 38,581 $ 40,127
Gross Unrealized Gains 2 2
Gross Unrealized Losses 2,390 2,538
Fixed maturities, at fair value (amortized cost of $38,581 and $40,127, respectively) 36,193 37,591
Total, estimated fair value 36,193 37,591
US Government Agencies Debt Securities [Member]    
Total 14,780 15,797
Gross Unrealized Gains 0 0
Gross Unrealized Losses 635 717
Fixed maturities, at fair value (amortized cost of $38,581 and $40,127, respectively) 14,145 15,080
Total, estimated fair value 14,145 15,080
US States and Political Subdivisions Debt Securities [Member]    
Total 3,224 2,390
Gross Unrealized Gains 0 0
Gross Unrealized Losses 155 158
Fixed maturities, at fair value (amortized cost of $38,581 and $40,127, respectively) 3,069 2,232
Total, estimated fair value 3,069 2,232
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Total 8,682 9,058
Gross Unrealized Gains 0 1
Gross Unrealized Losses 640 647
Fixed maturities, at fair value (amortized cost of $38,581 and $40,127, respectively) 8,042 8,412
Total, estimated fair value 8,042 8,412
Asset-Backed Securities [Member]    
Total 1,435 1,682
Gross Unrealized Gains 0 0
Gross Unrealized Losses 68 72
Fixed maturities, at fair value (amortized cost of $38,581 and $40,127, respectively) 1,367 1,610
Total, estimated fair value 1,367 1,610
Corporate Debt Securities [Member]    
Total 10,460 11,200
Gross Unrealized Gains 2 1
Gross Unrealized Losses 892 944
Fixed maturities, at fair value (amortized cost of $38,581 and $40,127, respectively) 9,570 10,257
Total, estimated fair value $ 9,570 $ 10,257