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Note 6 - Investments - Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Total $ 39,267 $ 40,127
Gross Unrealized Gains 21 2
Gross Unrealized Losses 2,131 2,538
Fixed maturities, at fair value (amortized cost of $39,267 and $40,127, respectively) 37,157 37,591
Total, estimated fair value 37,157 37,591
US Government Agencies Debt Securities [Member]    
Total 15,063 15,797
Gross Unrealized Gains 4 0
Gross Unrealized Losses 551 717
Fixed maturities, at fair value (amortized cost of $39,267 and $40,127, respectively) 14,516 15,080
Total, estimated fair value 14,516 15,080
US States and Political Subdivisions Debt Securities [Member]    
Total 3,241 2,390
Gross Unrealized Gains 6 0
Gross Unrealized Losses 127 158
Fixed maturities, at fair value (amortized cost of $39,267 and $40,127, respectively) 3,120 2,232
Total, estimated fair value 3,120 2,232
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Total 8,550 9,058
Gross Unrealized Gains 3 1
Gross Unrealized Losses 567 647
Fixed maturities, at fair value (amortized cost of $39,267 and $40,127, respectively) 7,986 8,412
Total, estimated fair value 7,986 8,412
Asset-Backed Securities [Member]    
Total 1,449 1,682
Gross Unrealized Gains 0 0
Gross Unrealized Losses 61 72
Fixed maturities, at fair value (amortized cost of $39,267 and $40,127, respectively) 1,388 1,610
Total, estimated fair value 1,388 1,610
Corporate Debt Securities [Member]    
Total 10,964 11,200
Gross Unrealized Gains 8 1
Gross Unrealized Losses 825 944
Fixed maturities, at fair value (amortized cost of $39,267 and $40,127, respectively) 10,147 10,257
Total, estimated fair value $ 10,147 $ 10,257