Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Balance			$ 7,674	$ 8,481	$ 8,481
Charge-offs			(135)	(586)	(755)
Recoveries			86	128	346
Provision for loan losses	$ 310	$ 4	444	54	(398)
Balance	8,069	8,077	8,069	8,077	7,674
Real Estate Construction Portfolio Segment[Member]
Balance			422	503	503
Provision for loan losses			285	(18)	(81)
Balance	707	485	707	485	422
Consumer Real Estate Portfolio Segment [Member]
Balance			1,930	2,165	2,165
Charge-offs				(13)	(13)
Recoveries					20
Provision for loan losses			189	(144)	(242)
Balance	2,119	2,008	2,119	2,008	1,930
Commercial Real Estate Portfolio Segment [Member]
Balance			3,121	3,853	3,853
Recoveries			24	25	159
Provision for loan losses			325	(427)	(891)
Balance	3,470	3,451	3,470	3,451	3,121
Commercial Non Real Estate Segment [Member]
Balance			1,099	670	670
Charge-offs			(2)	(485)	(526)
Recoveries			6	27	33
Provision for loan losses			(307)	655	922
Balance	796	867	796	867	1,099
Public Sector and IDA Portfolio Segment[Member]
Balance			297	339	339
Provision for loan losses			39	37	(42)
Balance	336	376	336	376	297
Consumer Non Real Estate Portfolio Segment [Member]
Balance			444	555	555
Charge-offs			(133)	(88)	(216)
Recoveries			56	76	134
Provision for loan losses			95	(26)	(29)
Balance	462	517	462	517	444
Unallocated Financing Receivables [Member]
Balance			361	396	396
Provision for loan losses			(182)	(23)	(35)
Balance	$ 179	$ 373	$ 179	$ 373	$ 361