Note 8 - Fair Value - Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Securities available for sale, at fair value	$ 121,434	$ 125,713
Fair value, held to maturity	19,882
Reported Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	31,283	64,659
Equity security	535	518
Noninterest-bearing deposits	121,398	107,197
Securities sold under repurchase agreements	4,772	5,564
Reported Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Certificates of deposit in other banks	100	100
Accrued interest receivable	2,388	2,439
Securities available for sale, at fair value	121,434	125,713
Fair value, held to maturity	17,292	17,156
Mortgage loans held for sale	641	157
Restricted stock, at cost	1,190	921
Bank owned life insurance	15,535	15,324
Fair value hedge	114	626
Interest-bearing deposits	627,500	651,609
Federal Home Loan Bank advances	10,000	5,000
Long-term debt, net	10,388	11,329
Accrued interest payable	919	1,003
Fair value hedge	233	28
Reported Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair value, held to maturity	4,036	3,343
Loans, net	615,469	582,993
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	31,283	64,659
Equity security	535	518
Noninterest-bearing deposits	121,398	107,197
Securities sold under repurchase agreements	4,772	5,564
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Certificates of deposit in other banks	100	100
Accrued interest receivable	2,388	2,439
Securities available for sale, at fair value	121,434	125,713
Fair value, held to maturity	15,846	15,589
Mortgage loans held for sale	641	157
Restricted stock, at cost	1,190	921
Bank owned life insurance	15,535	15,324
Fair value hedge	114	626
Interest-bearing deposits	630,136	654,346
Federal Home Loan Bank advances	9,811	4,957
Long-term debt, net	10,297	11,066
Accrued interest payable	919	1,003
Fair value hedge	233	28
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair value, held to maturity	4,036	3,343
Loans, net	$ 610,730	$ 572,346

Fair value portion of accrued interest payable.

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Fair value portion of accrued interest receivable.

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Fair value portion of certificates of deposit in other banks.

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Fair value portion of interest-bearing deposits.

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Fair value portion of noninterest-bearing deposit liabilities.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Aggregate fair value of all derivative liabilities designated as hedging instruments. Includes instruments designated as cash flow hedges, fair value hedges, and hedges of net investments in foreign operations.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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