Note 4 - Allowance for Loan Losses and Reserve for Unfunded Lending Commitments - Changes in Allowance for Loan Losses and Reserve for Unfunded Lending Commitments (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				$ 18,678	[1]	$ 21,403	$ 21,403
Provision for (recovery of) loan losses		$ 615	$ 482	438		(870)	(2,825)
Charge-offs				(185)		(70)	(146)
Recoveries				258		167	246
Balance		19,189	20,630	19,189		20,630	18,678	[1]
(Recovery of) provision for unfunded commitments		615	482	438		(870)	(2,825)
Financing Receivable, Credit Loss, Expense (Reversal)		615	482	438		(870)	(2,825)
Individually evaluated for impairment		217		217			7
Collectively evaluated for impairment		18,356		18,356			18,004
Loans and Leases Receivable, Allowance, Ending Balance		19,189	20,630	19,189		20,630	18,678	[1]
Individually evaluated for impairment		4,849		4,849			2,232
Collectively evaluated for impairment		2,098,720		2,098,720			1,924,546
Loans and Leases Receivable, Net of Deferred Income, Total		2,119,415		2,119,415			1,946,580	[1]
Financial Asset Acquired with Credit Deterioration [Member]
Balance				667
Balance		616		616			667
Loans and Leases Receivable, Allowance, Ending Balance		616		616			667
Loans and Leases Receivable, Net of Deferred Income, Total		15,846		15,846			19,802
Unfunded Loan Commitment [Member]
Provision for (recovery of) loan losses				(8)		23	82
Balance				386		304	304
(Recovery of) provision for unfunded commitments				(8)		23	82
Balance		378	$ 327	378		327	386
Financing Receivable, Credit Loss, Expense (Reversal)				(8)		23	82
Commercial Portfolio Segment [Member]
Balance	[2]			2,668		3,373	3,373
Provision for (recovery of) loan losses				60			(745)	[2]
Charge-offs	[2]			(78)			0
Recoveries	[2]			103			40
Balance	[2]	2,753		2,753			2,668
(Recovery of) provision for unfunded commitments				60			(745)	[2]
Financing Receivable, Credit Loss, Expense (Reversal)				60			(745)	[2]
Individually evaluated for impairment	[2]	169		169			7
Collectively evaluated for impairment	[2]	2,584		2,584			2,642
Loans and Leases Receivable, Allowance, Ending Balance	[2]	2,753		2,753			2,668
Individually evaluated for impairment	[2]	283		283			14
Collectively evaluated for impairment	[2]	295,167		295,167			299,470
Loans and Leases Receivable, Net of Deferred Income, Total	[2]	295,541		295,541			299,773
Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance	[2]			19
Balance	[2]	0		0			19
Loans and Leases Receivable, Allowance, Ending Balance	[2]	0		0			19
Loans and Leases Receivable, Net of Deferred Income, Total	[2]	91		91			289
Construction and Land Development [Member]
Balance				1,397		1,927	1,927
Provision for (recovery of) loan losses				487			(530)
Charge-offs				0			0
Recoveries				0			0
Balance		1,884		1,884			1,397
(Recovery of) provision for unfunded commitments				487			(530)
Financing Receivable, Credit Loss, Expense (Reversal)				487			(530)
Individually evaluated for impairment		0		0			0
Collectively evaluated for impairment		1,856		1,856			1,365
Loans and Leases Receivable, Allowance, Ending Balance		1,884		1,884			1,397
Individually evaluated for impairment		0		0			0
Collectively evaluated for impairment		209,306		209,306			133,984
Loans and Leases Receivable, Net of Deferred Income, Total		210,500		210,500			134,221
Construction and Land Development [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance				32
Balance		28		28			32
Loans and Leases Receivable, Allowance, Ending Balance		28		28			32
Loans and Leases Receivable, Net of Deferred Income, Total		1,194		1,194			237
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Balance				3,964		4,340	4,340
Provision for (recovery of) loan losses				(313)			(380)
Charge-offs				0			(3)
Recoveries				19			7
Balance		3,670		3,670			3,964
(Recovery of) provision for unfunded commitments				(313)			(380)
Financing Receivable, Credit Loss, Expense (Reversal)				(313)			(380)
Individually evaluated for impairment		0		0			0
Collectively evaluated for impairment		3,647		3,647			3,767
Loans and Leases Receivable, Allowance, Ending Balance		3,670		3,670			3,964
Individually evaluated for impairment		2,421		2,421			8
Collectively evaluated for impairment		413,810		413,810			382,562
Loans and Leases Receivable, Net of Deferred Income, Total		423,678		423,678			391,517
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance				197
Balance		23		23			197
Loans and Leases Receivable, Allowance, Ending Balance		23		23			197
Loans and Leases Receivable, Net of Deferred Income, Total		7,447		7,447			8,947
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Balance				7,141		7,626	7,626
Provision for (recovery of) loan losses				(48)			(493)
Charge-offs				0			0
Recoveries				3			8
Balance		7,096		7,096			7,141
(Recovery of) provision for unfunded commitments				(48)			(493)
Financing Receivable, Credit Loss, Expense (Reversal)				(48)			(493)
Individually evaluated for impairment		0		0			0
Collectively evaluated for impairment		6,580		6,580			6,778
Loans and Leases Receivable, Allowance, Ending Balance		7,096		7,096			7,141
Individually evaluated for impairment		1,068		1,068			1,185
Collectively evaluated for impairment		759,606		759,606			724,180
Loans and Leases Receivable, Net of Deferred Income, Total		764,963		764,963			731,034
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance				363
Balance		516		516			363
Loans and Leases Receivable, Allowance, Ending Balance		516		516			363
Loans and Leases Receivable, Net of Deferred Income, Total		4,289		4,289			5,669
Residential Portfolio Segment [Member]
Balance				3,458		4,067	4,067
Provision for (recovery of) loan losses				200			(655)
Charge-offs				(5)			(53)
Recoveries				37			99
Balance		3,690		3,690			3,458
(Recovery of) provision for unfunded commitments				200			(655)
Financing Receivable, Credit Loss, Expense (Reversal)				200			(655)
Individually evaluated for impairment		0		0			0
Collectively evaluated for impairment		3,641		3,641			3,402
Loans and Leases Receivable, Allowance, Ending Balance		3,690		3,690			3,458
Individually evaluated for impairment		982		982			1,025
Collectively evaluated for impairment		414,338		414,338			377,290
Loans and Leases Receivable, Net of Deferred Income, Total		418,127		418,127			382,960
Residential Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance				56
Balance		49		49			56
Loans and Leases Receivable, Allowance, Ending Balance		49		49			56
Loans and Leases Receivable, Net of Deferred Income, Total		2,807		2,807			4,645
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total		764,963		764,963			731,034
Consumer Portfolio Segment [Member]
Balance				50		$ 70	70
Provision for (recovery of) loan losses				52			(22)
Charge-offs				(102)			(90)
Recoveries				96			92
Balance		96		96			50
(Recovery of) provision for unfunded commitments				52			(22)
Financing Receivable, Credit Loss, Expense (Reversal)				52			(22)
Individually evaluated for impairment		48		48			0
Collectively evaluated for impairment		48		48			50
Loans and Leases Receivable, Allowance, Ending Balance		96		96			50
Individually evaluated for impairment		95		95			0
Collectively evaluated for impairment		6,493		6,493			7,060
Loans and Leases Receivable, Net of Deferred Income, Total		6,606		6,606			7,075
Consumer Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Balance				0
Balance		0		0			0
Loans and Leases Receivable, Allowance, Ending Balance		0		0			0
Loans and Leases Receivable, Net of Deferred Income, Total		$ 18		$ 18			$ 15

[1] Derived from audited consolidated financial statements

[2] Includes PPP loans, which are guaranteed by the SBA and have no related allowance.