Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Balance	$ 8,481	$ 6,863
Charge-offs	(755)	(720)
Recoveries	346	347
Provision for (recovery of) loan losses	(398)	1,991
Balance	7,674	8,481
Real Estate Construction Portfolio Segment[Member]
Balance	503	400
Provision for (recovery of) loan losses	(81)	103
Balance	422	503
Consumer Real Estate Portfolio Segment [Member]
Balance	2,165	1,895
Charge-offs	(13)	(85)
Recoveries	20	18
Provision for (recovery of) loan losses	(242)	337
Balance	1,930	2,165
Commercial Real Estate Portfolio Segment [Member]
Balance	3,853	2,559
Charge-offs	0	(15)
Recoveries	159	145
Provision for (recovery of) loan losses	(891)	1,164
Balance	3,121	3,853
Commercial Non Real Estate Segment [Member]
Balance	670	555
Charge-offs	(526)	(372)
Recoveries	33	9
Provision for (recovery of) loan losses	922	478
Balance	1,099	670
Public Sector and IDA Portfolio Segment[Member]
Balance	339	478
Provision for (recovery of) loan losses	(42)	(139)
Balance	297	339
Consumer Non Real Estate Portfolio Segment [Member]
Balance	555	650
Charge-offs	(216)	(248)
Recoveries	134	175
Provision for (recovery of) loan losses	(29)	(22)
Balance	444	555
Unallocated Financing Receivables [Member]
Balance	396	326
Provision for (recovery of) loan losses	(35)	70
Balance	$ 361	$ 396