Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Balance			$ 7,674	$ 8,481	$ 8,481
Charge-offs			(316)	(690)	(755)
Recoveries			153	245	346
Provision for (recovery of) loan losses	$ 252	$ (392)	696	(338)	(398)
Balance	8,207	7,698	8,207	7,698	7,674
Real Estate Construction Portfolio Segment[Member]
Balance			422	503	503
Provision for (recovery of) loan losses			225	(5)	(81)
Balance	647	498	647	498	422
Consumer Real Estate Portfolio Segment [Member]
Balance			1,930	2,165	2,165
Charge-offs			(13)	(13)	(13)
Recoveries			29	19	20
Provision for (recovery of) loan losses			266	(203)	(242)
Balance	2,212	1,968	2,212	1,968	1,930
Commercial Real Estate Portfolio Segment [Member]
Balance			3,121	3,853	3,853
Recoveries			36	86	159
Provision for (recovery of) loan losses			452	(776)	(891)
Balance	3,609	3,163	3,609	3,163	3,121
Commercial Non Real Estate Segment [Member]
Balance			1,099	670	670
Charge-offs			(2)	(526)	(526)
Recoveries			10	31	33
Provision for (recovery of) loan losses			(329)	743	922
Balance	778	918	778	918	1,099
Public Sector and IDA Portfolio Segment[Member]
Balance			297	339	339
Provision for (recovery of) loan losses			39	(27)	(42)
Balance	336	312	336	312	297
Consumer Non Real Estate Portfolio Segment [Member]
Balance			444	555	555
Charge-offs			(301)	(151)	(216)
Recoveries			78	109	134
Provision for (recovery of) loan losses			263	(39)	(29)
Balance	484	474	484	474	444
Unallocated Financing Receivables [Member]
Balance			361	396	396
Provision for (recovery of) loan losses			(220)	(31)	(35)
Balance	$ 141	$ 365	$ 141	$ 365	$ 361