Note 9 - Allowance for Loan Losses and Credit Quality Information - Classified and Unclassified Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans receivable	$ 750,866	$ 662,000
Classified [Member]
Loans receivable	48,301	42,709
Classified [Member] | Special Mention [Member]
Loans receivable	30,371	25,179
Classified [Member] | Substandard [Member]
Loans receivable	17,776	17,403
Classified [Member] | Doubtful [Member]
Loans receivable	67	77
Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans receivable	87	50
Unclassified [Member]
Loans receivable	702,565	619,291
Residential Portfolio Segment [Member]
Loans receivable	188,045	163,322
Residential Portfolio Segment [Member] | Classified [Member]
Loans receivable	2,732	1,257
Residential Portfolio Segment [Member] | Classified [Member] | Special Mention [Member]
Loans receivable	1,364	410
Residential Portfolio Segment [Member] | Classified [Member] | Substandard [Member]
Loans receivable	1,319	791
Residential Portfolio Segment [Member] | Classified [Member] | Doubtful [Member]
Loans receivable	49	56
Residential Portfolio Segment [Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans receivable	0	0
Residential Portfolio Segment [Member] | Unclassified [Member]
Loans receivable	185,313	162,065
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	455,361	396,868
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Loans receivable	241,362	209,666
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Loans receivable	213,999	187,202
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Real Estate Loan [Member]
Loans receivable	18,454	20,765
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Commercial Real Estate Other [Member]
Loans receivable	22,946	16,395
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Special Mention [Member] | Real Estate Loan [Member]
Loans receivable	14,878	16,012
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Special Mention [Member] | Commercial Real Estate Other [Member]
Loans receivable	12,867	6,824
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Substandard [Member] | Real Estate Loan [Member]
Loans receivable	3,576	4,753
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Substandard [Member] | Commercial Real Estate Other [Member]
Loans receivable	10,079	9,571
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Doubtful [Member] | Real Estate Loan [Member]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Doubtful [Member] | Commercial Real Estate Other [Member]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member] | Real Estate Loan [Member]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member] | Commercial Real Estate Other [Member]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Unclassified [Member] | Real Estate Loan [Member]
Loans receivable	222,908	188,901
Commercial Real Estate Portfolio Segment [Member] | Unclassified [Member] | Commercial Real Estate Other [Member]
Loans receivable	191,053	170,807
Consumer Portfolio Segment [Member]
Loans receivable	44,224	41,645
Consumer Portfolio Segment [Member] | Classified [Member]
Loans receivable	462	546
Consumer Portfolio Segment [Member] | Classified [Member] | Special Mention [Member]
Loans receivable	0	0
Consumer Portfolio Segment [Member] | Classified [Member] | Substandard [Member]
Loans receivable	357	475
Consumer Portfolio Segment [Member] | Classified [Member] | Doubtful [Member]
Loans receivable	18	21
Consumer Portfolio Segment [Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans receivable	87	50
Consumer Portfolio Segment [Member] | Unclassified [Member]
Loans receivable	43,762	41,099
Commercial Portfolio Segment [Member]
Loans receivable	63,236	60,165
Commercial Portfolio Segment [Member] | Classified [Member]
Loans receivable	3,707	3,746
Commercial Portfolio Segment [Member] | Classified [Member] | Special Mention [Member]
Loans receivable	1,262	1,933
Commercial Portfolio Segment [Member] | Classified [Member] | Substandard [Member]
Loans receivable	2,445	1,813
Commercial Portfolio Segment [Member] | Classified [Member] | Doubtful [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Unclassified [Member]
Loans receivable	$ 59,529	$ 56,419