Note 6 - Allowance for Loan Losses and Credit Quality Information - Classified and Unclassified Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Loans receivable	$ 787,887	$ 662,000
Classified [Member]
Loans receivable	37,927	42,709
Classified [Member] | Special Mention [Member]
Loans receivable	22,684	25,179
Classified [Member] | Substandard [Member]
Loans receivable	15,090	17,403
Classified [Member] | Doubtful [Member]
Loans receivable	67	77
Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans receivable	86	50
Unclassified [Member]
Loans receivable	749,960	619,291
Residential Portfolio Segment [Member]
Loans receivable	205,890	163,322
Residential Portfolio Segment [Member] | Classified [Member]
Loans receivable	2,996	1,257
Residential Portfolio Segment [Member] | Classified [Member] | Special Mention [Member]
Loans receivable	882	410
Residential Portfolio Segment [Member] | Classified [Member] | Substandard [Member]
Loans receivable	2,067	791
Residential Portfolio Segment [Member] | Classified [Member] | Doubtful [Member]
Loans receivable	47	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	202,894	162,065
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	471,345	396,868
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Loans receivable	249,783	209,666
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Loans receivable	221,562	187,202
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Real Estate Loan [Member]
Loans receivable	11,770	20,765
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Commercial Real Estate Other [Member]
Loans receivable	19,865	16,395
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Special Mention [Member] | Real Estate Loan [Member]
Loans receivable	9,529	16,012
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Special Mention [Member] | Commercial Real Estate Other [Member]
Loans receivable	11,273	6,824
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Substandard [Member] | Real Estate Loan [Member]
Loans receivable	2,241	4,753
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Substandard [Member] | Commercial Real Estate Other [Member]
Loans receivable	8,592	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	238,013	188,901
Commercial Real Estate Portfolio Segment [Member] | Unclassified [Member] | Commercial Real Estate Other [Member]
Loans receivable	201,697	170,807
Consumer Portfolio Segment [Member]
Loans receivable	44,817	41,645
Consumer Portfolio Segment [Member] | Classified [Member]
Loans receivable	493	546
Consumer Portfolio Segment [Member] | Classified [Member] | Special Mention [Member]
Loans receivable	0	0
Consumer Portfolio Segment [Member] | Classified [Member] | Substandard [Member]
Loans receivable	387	475
Consumer Portfolio Segment [Member] | Classified [Member] | Doubtful [Member]
Loans receivable	20	21
Consumer Portfolio Segment [Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans receivable	86	50
Consumer Portfolio Segment [Member] | Unclassified [Member]
Loans receivable	44,324	41,099
Commercial Portfolio Segment [Member]
Loans receivable	65,835	60,165
Commercial Portfolio Segment [Member] | Classified [Member]
Loans receivable	2,803	3,746
Commercial Portfolio Segment [Member] | Classified [Member] | Special Mention [Member]
Loans receivable	1,000	1,933
Commercial Portfolio Segment [Member] | Classified [Member] | Substandard [Member]
Loans receivable	1,803	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	$ 63,032	$ 56,419