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Note 6 - Investments - Unrealized Loss Position (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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US Government Agencies Debt Securities [Member] |  |
Less than 12 months, estimated fair value | $ 2,373 | $ 3,237
Less than 12 Months | 24 | 46
Greater than 12 months, estimated fair value | 5,467 | 7,940
Greater than 12 Months | 158 | 349
Estimated fair value | 7,840 | 11,177
Total, debt securities | 182 | 395
US States and Political Subdivisions Debt Securities [Member] |  |
Less than 12 months, estimated fair value | 149 | 0
Less than 12 Months | 2 | 0
Greater than 12 months, estimated fair value | 1,596 | 1,705
Greater than 12 Months | 60 | 105
Estimated fair value | 1,745 | 1,705
Total, debt securities | 62 | 105
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] |  |
Less than 12 months, estimated fair value | 857 | 737
Less than 12 Months | 4 | 11
Greater than 12 months, estimated fair value | 4,891 | 6,067
Greater than 12 Months | 318 | 483
Estimated fair value | 5,748 | 6,804
Total, debt securities | 322 | 494
Asset-Backed Securities [Member] |  |
Less than 12 months, estimated fair value | 0 | 0
Less than 12 Months | 0 | 0
Greater than 12 months, estimated fair value | 840 | 1,050
Greater than 12 Months | 22 | 45
Estimated fair value | 840 | 1,050
Total, debt securities | 22 | 45
Corporate Debt Securities [Member] |  |
Less than 12 months, estimated fair value | 350 | 937
Less than 12 Months | 1 | 11
Greater than 12 months, estimated fair value | 7,649 | 8,013
Greater than 12 Months | 389 | 637
Estimated fair value | 7,999 | 8,950
Total, debt securities | 390 | 648
Fixed Maturities [Member] |  |
Less than 12 months, estimated fair value | 3,729 | 4,911
Less than 12 Months | 31 | 68
Greater than 12 months, estimated fair value | 20,443 | 24,775
Greater than 12 Months | 947 | 1,619
Estimated fair value | 24,172 | 29,686
Total, debt securities | $ 978 | $ 1,687

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
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