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Note 3 - Loans - Loans Modified During Period (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Modified Amortized Cost |  | $ 30,406 | $ 22,436
Modified Amortized Cost, percent |  | 0.22% | 0.17%
Extended Maturity [Member] |  |  |
Modified Amortized Cost |  | $ 150 | $ 3,985
Payment Deferral [Member] |  |  |
Modified Amortized Cost |  | 29,762 | 18,355
Payment Deferral and Extended Maturity [Member] |  |  |
Modified Amortized Cost |  | 494 | 0
New Loan [Member] |  |  |
Modified Amortized Cost |  | 0 | 96
Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |  |
Modified Amortized Cost |  | 10,807 | $ 12,602
Total Payment Deferral | $ 1,403 | $ 903 |
Modified Amortized Cost, percent |  | 0.08% | 0.10%
Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] | Minimum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  | 3 months | 4 months
Term Extensions (Month) |  | 3 months | 4 months
Commercial Real Estate Portfolio Segment [Member] | Commercial, Financial, and Agricultural Loans [Member] | Maximum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  | 58 months | 95 months
Term Extensions (Month) |  | 58 months | 95 months
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |  |
Modified Amortized Cost |  | $ 150 | $ 248
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |  |
Modified Amortized Cost |  | 10,163 | 12,354
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral and Extended Maturity [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |  |
Modified Amortized Cost |  | 494 | 0
Commercial Real Estate Portfolio Segment [Member] | New Loan [Member] | Commercial, Financial, and Agricultural Loans [Member] |  |  |
Modified Amortized Cost |  | 0 | 0
Real Estate Portfolio Segment[Member] | Construction Loans [Member] |  |  |
Modified Amortized Cost |  | 5,945 |
Total Payment Deferral | 0 | $ 339 |
Modified Amortized Cost, percent |  | 0.04% |
Real Estate Portfolio Segment[Member] | Construction Loans [Member] | Minimum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  | 4 months |
Term Extensions (Month) |  | 4 months |
Real Estate Portfolio Segment[Member] | Construction Loans [Member] | Maximum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  | 5 months |
Term Extensions (Month) |  | 5 months |
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] |  |  |
Modified Amortized Cost |  | $ 13,252 | $ 9,389
Total Payment Deferral | 16 | $ 232 |
Modified Amortized Cost, percent |  | 0.10% | 0.07%
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] | Minimum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  | 4 months | 5 months
Term Extensions (Month) |  | 4 months | 5 months
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member] | Maximum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  | 8 months | 60 months
Term Extensions (Month) |  | 8 months | 60 months
Real Estate Portfolio Segment[Member] | One to Four Family [Member] |  |  |
Modified Amortized Cost |  | $ 402 | $ 445
Financing Receivable, Modified, Term Extension (Month) |  | 4 months |
Total Payment Deferral | 9 | $ 17 |
Modified Amortized Cost, percent |  | 0.00% | 0.00%
Term Extensions (Month) |  | 4 months |
Real Estate Portfolio Segment[Member] | One to Four Family [Member] | Minimum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  |  | 3 months
Term Extensions (Month) |  |  | 3 months
Real Estate Portfolio Segment[Member] | One to Four Family [Member] | Maximum [Member] |  |  |
Financing Receivable, Modified, Term Extension (Month) |  |  | 121 months
Term Extensions (Month) |  |  | 121 months
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member] |  |  |
Total Payment Deferral | $ 0 | $ 0 |
Real Estate Portfolio Segment[Member] | Extended Maturity [Member] | Construction Loans [Member] |  |  |
Modified Amortized Cost |  | 0 |
Real Estate Portfolio Segment[Member] | Extended Maturity [Member] | Owner Occupied Commercial [Member] |  |  |
Modified Amortized Cost |  | 0 | $ 3,562
Real Estate Portfolio Segment[Member] | Extended Maturity [Member] | One to Four Family [Member] |  |  |
Modified Amortized Cost |  | 0 | 175
Real Estate Portfolio Segment[Member] | Payment Deferral [Member] | Owner Occupied Commercial [Member] | Maximum [Member] |  |  |
Modified Amortized Cost |  | 13,252 | 5,827
Real Estate Portfolio Segment[Member] | Payment Deferral [Member] | One to Four Family [Member] |  |  |
Modified Amortized Cost |  | 402 | 174
Real Estate Portfolio Segment[Member] | Payment Deferral and Extended Maturity [Member] | Owner Occupied Commercial [Member] |  |  |
Modified Amortized Cost |  | 0 | 0
Real Estate Portfolio Segment[Member] | Payment Deferral and Extended Maturity [Member] | One to Four Family [Member] |  |  |
Modified Amortized Cost |  | 0 | 0
Real Estate Portfolio Segment[Member] | New Loan [Member] | Construction Loans [Member] |  |  |
Modified Amortized Cost |  | 0 |
Real Estate Portfolio Segment[Member] | New Loan [Member] | Owner Occupied Commercial [Member] |  |  |
Modified Amortized Cost |  | 0 | 0
Real Estate Portfolio Segment[Member] | New Loan [Member] | One to Four Family [Member] |  |  |
Modified Amortized Cost |  | $ 0 | $ 96

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- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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