Note 5 - Allowance for Loan Losses on Loans and Nonperforming Assets - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 8,225	$ 7,674
Charge-offs	(478)	(367)
Recoveries	283	212
Provision for credit losses	(1,278)	706
Balance	9,094	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
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	(21)	28
Balance	408	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
Charge-offs	(17)	(13)
Recoveries	103	29
Provision for credit losses	(384)	253
Balance	3,162	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
Charge-offs	0	0
Recoveries	45	49
Provision for credit losses	(811)	472
Balance	3,576	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
Charge-offs	(214)	(2)
Recoveries	6	11
Provision for credit losses	(256)	(178)
Balance	682	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
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	29	22
Balance	333	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
Charge-offs	(247)	(352)
Recoveries	129	123
Provision for credit losses	123	291
Balance	583	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
Charge-offs	0	0
Recoveries	0	0
Provision for credit losses	42	(182)
Balance	350	179
Unallocated Financing Receivables [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance	$ 129
Balance		$ 129