Note 2 - Loans and Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Balance			$ 8,225	$ 7,674	$ 7,674
Charge-offs			(232)	(316)	(367)
Recoveries			235	153	212
(Recovery of) provision for credit losses	$ (401)	$ 252	(389)	696	706
Balance	10,181	8,207	10,181	8,207	8,225
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			2,342
Balance					2,342
Real Estate Construction Portfolio Segment[Member]
Balance			450	422	422
Charge-offs			0	0	0
Recoveries			0	0	0
(Recovery of) provision for credit losses			133	225	28
Balance	562	647	562	647	450
Real Estate Construction Portfolio Segment[Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			(21)
Balance					(21)
Consumer Real Estate Portfolio Segment [Member]
Balance			2,199	1,930	1,930
Charge-offs			(17)	(13)	(13)
Recoveries			103	29	29
(Recovery of) provision for credit losses			(353)	266	253
Balance	3,193	2,212	3,193	2,212	2,199
Consumer Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			1,261
Balance					1,261
Commercial Real Estate Portfolio Segment [Member]
Balance			3,642	3,121	3,121
Charge-offs			0	0	0
Recoveries			37	36	49
(Recovery of) provision for credit losses			(212)	452	472
Balance	4,167	3,609	4,167	3,609	3,642
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			700
Balance					700
Commercial Non Real Estate Segment [Member]
Balance			930	1,099	1,099
Charge-offs			(11)	(2)	(2)
Recoveries			4	10	11
(Recovery of) provision for credit losses			(300)	(329)	(178)
Balance	839	778	839	778	930
Commercial Non Real Estate Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			216
Balance					216
Public Sector and IDA Portfolio Segment[Member]
Balance			319	297	297
Charge-offs			0	0	0
Recoveries			0	0	0
(Recovery of) provision for credit losses			10	39	22
Balance	314	336	314	336	319
Public Sector and IDA Portfolio Segment[Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			(15)
Balance					(15)
Consumer Non Real Estate Portfolio Segment [Member]
Balance			506	444	444
Charge-offs			(204)	(301)	(352)
Recoveries			91	78	123
(Recovery of) provision for credit losses			156	263	291
Balance	621	484	621	484	506
Consumer Non Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			72
Balance					72
Unallocated Financing Receivables [Member]
Balance			179	361	361
Charge-offs			0	0	0
Recoveries			0	0	0
(Recovery of) provision for credit losses			177	(220)	(182)
Balance	$ 485	$ 141	485	$ 141	179
Unallocated Financing Receivables [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance			$ 129
Balance					$ 129