Note 3 - Loans and Allowance for Credit Losses - Loans and Allowance for Loan Losses by Evaluation Method (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Allowance for loan losses	$ 10,490	$ 10,262	$ 9,055	$ 9,094
Loans, individually evaluated	10,414	10,521
Loans, collectively evaluated	993,491	978,092
Loans	1,003,905	988,613
Individually Evaluated [Member]
Allowance for loan losses	76	80
Collectively Evaluated [Member]
Allowance for loan losses	10,414	10,182
Real Estate Construction Portfolio Segment [Member]
Allowance for loan losses	330	348	349	408
Loans, individually evaluated	0	0
Loans, collectively evaluated	42,942	50,798
Loans	42,942	50,798
Real Estate Construction Portfolio Segment [Member] \| Individually Evaluated [Member]
Allowance for loan losses	0	0
Real Estate Construction Portfolio Segment [Member] \| Collectively Evaluated [Member]
Allowance for loan losses	330	348
Consumer Real Estate Portfolio Segment [Member]
Allowance for loan losses	3,891	3,926	2,968	3,162
Loans, individually evaluated	486	497
Loans, collectively evaluated	311,063	307,358
Loans	311,549	307,855
Consumer Real Estate Portfolio Segment [Member] \| Individually Evaluated [Member]
Allowance for loan losses	29	31
Consumer Real Estate Portfolio Segment [Member] \| Collectively Evaluated [Member]
Allowance for loan losses	3,862	3,895
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses	4,591	4,299	3,856	3,576
Loans, individually evaluated	9,928	10,024
Loans, collectively evaluated	487,144	468,054
Loans	497,072	478,078
Commercial Real Estate Portfolio Segment [Member] \| Individually Evaluated [Member]
Allowance for loan losses	47	49
Commercial Real Estate Portfolio Segment [Member] \| Collectively Evaluated [Member]
Allowance for loan losses	4,544	4,250
Commercial Non Real Estate Segment [Member]
Allowance for loan losses	663	655	647	682
Loans, individually evaluated	0	0
Loans, collectively evaluated	53,156	51,844
Loans	53,156	51,844
Commercial Non Real Estate Segment [Member] \| Individually Evaluated [Member]
Allowance for loan losses	0	0
Commercial Non Real Estate Segment [Member] \| Collectively Evaluated [Member]
Allowance for loan losses	663	655
Public Sector and IDA Portfolio Segment [Member]
Allowance for loan losses	351	336	321	333
Loans, individually evaluated	0	0
Loans, collectively evaluated	56,981	57,171
Loans	56,981	57,171
Public Sector and IDA Portfolio Segment [Member] \| Individually Evaluated [Member]
Allowance for loan losses	0	0
Public Sector and IDA Portfolio Segment [Member] \| Collectively Evaluated [Member]
Allowance for loan losses	351	336
Consumer Non Real Estate Portfolio Segment [Member]
Allowance for loan losses	629	648	533	583
Loans, individually evaluated	0	0
Loans, collectively evaluated	42,205	42,867
Loans	42,205	42,867
Consumer Non Real Estate Portfolio Segment [Member] \| Individually Evaluated [Member]
Allowance for loan losses	0	0
Consumer Non Real Estate Portfolio Segment [Member] \| Collectively Evaluated [Member]
Allowance for loan losses	629	648
Unallocated Financing Receivables [Member]
Allowance for loan losses	35	50	$ 381	$ 350
Unallocated Financing Receivables [Member] \| Individually Evaluated [Member]
Allowance for loan losses	0	0
Unallocated Financing Receivables [Member] \| Collectively Evaluated [Member]
Allowance for loan losses	$ 35	$ 50

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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