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Note 6 - Allowance for Credit Losses - Changes in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance				$ 26,182	$ 26,182	$ 18,425
(Recovery of) provision for credit/loan losses	$ (846)	$ (1,394)	$ (2,230)	(4,001)	(8,471)	12,668	$ 3,571
Charge-offs					(6,774)	(6,623)
Recoveries					3,814	1,712
Net (charge-offs) recoveries					(2,960)	4,911
Balance	27,858				27,858	26,182	18,425
Net charge-offs					2,960	(4,911)
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member]
Balance				13,107	13,107
Balance						13,107
Commercial Portfolio Segment [Member]
Balance				14,661	14,661	10,235
(Recovery of) provision for credit/loan losses					(6,949)	6,583
Charge-offs					(3,431)	(2,769)
Recoveries					2,134	612
Net (charge-offs) recoveries					(1,297)	2,157
Balance	14,775				14,775	14,661	10,235
Net charge-offs					1,297	(2,157)
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member]
Balance				8,360	8,360
Balance						8,360
Consumer Real Estate Portfolio Segment [Member]
Balance				8,951	8,951	6,325
(Recovery of) provision for credit/loan losses					(3,653)	2,760
Charge-offs					(318)	(558)
Recoveries					847	424
Net (charge-offs) recoveries					529	134
Balance	9,972				9,972	8,951	6,325
Net charge-offs					(529)	(134)
Consumer Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member]
Balance				4,145	4,145
Balance						4,145
Consumer and Other Portfolio Segment [Member]
Balance				2,570	2,570	1,865
(Recovery of) provision for credit/loan losses					2,131	3,325
Charge-offs					(3,025)	(3,296)
Recoveries					833	676
Net (charge-offs) recoveries					(2,192)	2,620
Balance	$ 3,111				3,111	2,570	$ 1,865
Net charge-offs					2,192	(2,620)
Consumer and Other Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member]
Balance				$ 602	$ 602
Balance						$ 602

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- Definition

Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss, or the excess of the recovery over the writeoff.

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