Note 3 - Loans and Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance at beginning of period	$ 23,854	$ 19,484	$ 21,351
(Reversal) provision	2	4,307	0
Chargeoffs	(3,248)	(4,199)	(4,570)
Recoveries	2,906	2,245	2,703
Total allowance for credit losses	23,514	23,854	19,484
Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at beginning of period		2,017
Total allowance for credit losses			2,017
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at beginning of period		21,501
Total allowance for credit losses			21,501
Unallocated Financing Receivable [Member]
Balance at beginning of period	0	3,701	3,177
(Reversal) provision		0	524
Chargeoffs		0	0
Recoveries		0	0
Total allowance for credit losses		0	3,701
Commercial Portfolio Segment [Member]
Balance at beginning of period	9,205	4,959	6,311
(Reversal) provision	(2,411)	746	(2,023)
Chargeoffs	(56)	(236)	(97)
Recoveries	228	351	768
Total allowance for credit losses	6,966	9,205	4,959
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at beginning of period		3,385
Total allowance for credit losses			3,385
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at beginning of period		8,344
Total allowance for credit losses			8,344
Commercial Real Estate Portfolio Segment [Member]
Balance at beginning of period	5,660	4,064	3,884
(Reversal) provision	126	929	(16)
Chargeoffs	0	0	0
Recoveries	743	49	196
Total allowance for credit losses	6,529	5,660	4,064
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at beginning of period		618
Total allowance for credit losses			618
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at beginning of period		4,682
Total allowance for credit losses			4,682
Construction Portfolio Segment [Member]
Balance at beginning of period	6	109	1,465
(Reversal) provision	(4)	(72)	(1,356)
Chargeoffs	0	0	0
Recoveries	0	0	0
Total allowance for credit losses	2	6	109
Construction Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at beginning of period		(31)
Total allowance for credit losses			(31)
Construction Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at beginning of period		78
Total allowance for credit losses			78
Residential Portfolio Segment [Member]
Balance at beginning of period	47	206	869
(Reversal) provision	(2)	(27)	(663)
Chargeoffs	0	0	0
Recoveries	0	0	0
Total allowance for credit losses	45	47	206
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at beginning of period		(132)
Total allowance for credit losses			(132)
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at beginning of period		74
Total allowance for credit losses			74
Consumer Portfolio Segment [Member]
Balance at beginning of period	8,936	6,445	5,645
(Reversal) provision	2,293	2,731	3,534
Chargeoffs	(3,192)	(3,963)	(4,473)
Recoveries	1,935	1,845	1,739
Total allowance for credit losses	$ 9,972	8,936	6,445
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at beginning of period		1,878
Total allowance for credit losses			1,878
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at beginning of period		8,323
Total allowance for credit losses			8,323
Unallocated Financing Receivable [Member]
Balance at beginning of period		3,701
Total allowance for credit losses			3,701
Unallocated Financing Receivable [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at beginning of period		(3,701)
Total allowance for credit losses			(3,701)
Unallocated Financing Receivable [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Balance at beginning of period		$ 0
Total allowance for credit losses			$ 0