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Note 6 - Investments - Unrealized Loss Position (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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US Government Agencies Debt Securities [Member] |  |
Less than 12 months, estimated fair value | $ 2,471 | $ 2,417
Less than 12 Months | 20 | 28
Greater than 12 months, estimated fair value | 2,103 | 7,984
Greater than 12 Months | 48 | 190
Estimated fair value | 4,574 | 10,401
Total, debt securities | 68 | 218
US States and Political Subdivisions Debt Securities [Member] |  |
Less than 12 months, estimated fair value | 299 | 331
Less than 12 Months | 1 | 1
Greater than 12 months, estimated fair value | 1,082 | 1,981
Greater than 12 Months | 26 | 72
Estimated fair value | 1,381 | 2,312
Total, debt securities | 27 | 73
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] |  |
Less than 12 months, estimated fair value | 813 | 3,006
Less than 12 Months | 3 | 57
Greater than 12 months, estimated fair value | 3,456 | 5,477
Greater than 12 Months | 247 | 376
Estimated fair value | 4,269 | 8,483
Total, debt securities | 250 | 433
Asset-Backed Securities [Member] |  |
Less than 12 months, estimated fair value | 61 | 254
Less than 12 Months | 0 | 0
Greater than 12 months, estimated fair value | 451 | 756
Greater than 12 Months | 13 | 22
Estimated fair value | 512 | 1,010
Total, debt securities | 13 | 22
Corporate Debt Securities [Member] |  |
Less than 12 months, estimated fair value | 425 | 966
Less than 12 Months | 1 | 10
Greater than 12 months, estimated fair value | 6,263 | 7,274
Greater than 12 Months | 226 | 432
Estimated fair value | 6,688 | 8,240
Total, debt securities | 227 | 442
Fixed Maturities [Member] |  |
Less than 12 months, estimated fair value | 4,069 | 6,974
Less than 12 Months | 25 | 96
Greater than 12 months, estimated fair value | 13,355 | 23,472
Greater than 12 Months | 560 | 1,092
Estimated fair value | 17,424 | 30,446
Total, debt securities | $ 585 | $ 1,188

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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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