Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 7,674	$ 8,481
Charge-offs	(367)	(755)
Recoveries	212	346
Provision for (recovery of) loan losses	706	(398)
Balance	8,225	7,674
Real Estate Construction Portfolio Segment[Member]
Balance	422	503
Provision for (recovery of) loan losses	28	(81)
Balance	450	422
Consumer Real Estate Portfolio Segment [Member]
Balance	1,930	2,165
Charge-offs	(13)	(13)
Recoveries	29	20
Provision for (recovery of) loan losses	253	(242)
Balance	2,199	1,930
Commercial Real Estate Portfolio Segment [Member]
Balance	3,121	3,853
Recoveries	49	159
Provision for (recovery of) loan losses	472	(891)
Balance	3,642	3,121
Commercial Non Real Estate Segment [Member]
Balance	1,099	670
Charge-offs	(2)	(526)
Recoveries	11	33
Provision for (recovery of) loan losses	(178)	922
Balance	930	1,099
Public Sector and IDA Portfolio Segment[Member]
Balance	297	339
Provision for (recovery of) loan losses	22	(42)
Balance	319	297
Consumer Non Real Estate Portfolio Segment [Member]
Balance	444	555
Charge-offs	(352)	(216)
Recoveries	123	134
Provision for (recovery of) loan losses	291	(29)
Balance	506	444
Unallocated Financing Receivables [Member]
Balance	361	396
Provision for (recovery of) loan losses	(182)	(35)
Balance	$ 179	$ 361