Note 6 - Premises and Equipment - Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment, Gross	$ 16,372	$ 16,066
Accumulated depreciation and amortization	9,231	8,717
Property, Plant and Equipment, Net	7,141	7,349
Depreciation and amortization expense	578	559
Land and Land Improvements [Member]
Property, Plant and Equipment, Gross	2,603	2,603
Building and Building Improvements [Member]
Property, Plant and Equipment, Gross	$ 7,434	7,434
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	15 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	39 years
Furniture and Fixtures [Member]
Property, Plant and Equipment, Gross	$ 6,335	$ 6,029
Furniture and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Estimated Useful Lives (Year)	10 years

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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