Note 5 - Loans and Allowance for Credit Losses - Loan Modifications (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Modified	0.69%	0.35%
Extended Maturity [Member]
Total	$ 4,380	$ 2,038
Commercial Real Estate Portfolio Segment [Member]
Total Financing Receivables, Percentage	1.01%
Financing Receivable, Modified		0.51%
Commercial Real Estate Portfolio Segment [Member] \| Extended Maturity [Member]
Financing Receivable, Modified	$ 4,380	$ 2,038

Accumulated amortized cost excluding accrued interest, of financing receivable modified for debtor experiencing financial difficulty.

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-Topic 310
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-Publisher FASB
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- Definition

Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 42
-Subparagraph (a)(1)
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Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

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Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
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-Section 55
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