Note 3 - Loans - Past Due Loans (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Loans, net of deferred fees and costs		$ 1,988,008	$ 1,946,580	[1]
90 days past due and still accruing		71	216
Nonaccrual loans		1,762	2,006
Loans and Leases Receivable, Net of Deferred Income		1,988,008	1,946,580	[1]
Financial Asset, 30 to 59 Days Past Due [Member]
Loans, net of deferred fees and costs		620	808
Loans and Leases Receivable, Net of Deferred Income		620	808
Financial Asset, 60 to 89 Days Past Due [Member]
Loans, net of deferred fees and costs		240	50
Loans and Leases Receivable, Net of Deferred Income		240	50
Financial Asset, Past Due [Member]
Loans, net of deferred fees and costs		2,693	3,080
Loans and Leases Receivable, Net of Deferred Income		2,693	3,080
Financial Asset, Not Past Due [Member]
Loans, net of deferred fees and costs		1,985,315	1,943,500
Loans and Leases Receivable, Net of Deferred Income		1,985,315	1,943,500
Commercial Portfolio Segment [Member]
Loans, net of deferred fees and costs	[2]	291,697	299,773
90 days past due and still accruing		0	0
Nonaccrual loans		17	26
Loans and Leases Receivable, Net of Deferred Income	[2]	291,697	299,773
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans, net of deferred fees and costs		0	120
Loans and Leases Receivable, Net of Deferred Income		0	120
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans, net of deferred fees and costs		17	146
Loans and Leases Receivable, Net of Deferred Income		17	146
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans, net of deferred fees and costs		291,680	299,627
Loans and Leases Receivable, Net of Deferred Income		291,680	299,627
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs		148,276	134,221
90 days past due and still accruing		0	0
Nonaccrual loans		0	0
Loans and Leases Receivable, Net of Deferred Income		148,276	134,221
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		402,306	391,517
90 days past due and still accruing		0	0
Nonaccrual loans		4	12
Loans and Leases Receivable, Net of Deferred Income		402,306	391,517
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		752,817	731,034
90 days past due and still accruing		0	0
Nonaccrual loans		1,073	1,093
Loans and Leases Receivable, Net of Deferred Income		752,817	731,034
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		240	0
Loans and Leases Receivable, Net of Deferred Income		240	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		4	12
Loans and Leases Receivable, Net of Deferred Income		4	12
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		1,313	1,093
Loans and Leases Receivable, Net of Deferred Income		1,313	1,093
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs		148,276	134,221
Loans and Leases Receivable, Net of Deferred Income		148,276	134,221
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		402,302	391,505
Loans and Leases Receivable, Net of Deferred Income		402,302	391,505
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		751,504	729,941
Loans and Leases Receivable, Net of Deferred Income		751,504	729,941
Residential Portfolio Segment [Member]
Loans, net of deferred fees and costs		385,542	382,960
Loans and Leases Receivable, Net of Deferred Income		385,542	382,960
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs		752,817	731,034
Loans and Leases Receivable, Net of Deferred Income		752,817	731,034
Residential Portfolio Segment [Member] | Residential [Member]
Loans, net of deferred fees and costs		295,949	289,757
90 days past due and still accruing		0	154
Nonaccrual loans		581	792
Loans and Leases Receivable, Net of Deferred Income		295,949	289,757
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs		89,593	93,203
90 days past due and still accruing		50	47
Nonaccrual loans		87	80
Loans and Leases Receivable, Net of Deferred Income		89,593	93,203
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs		593	670
Loans and Leases Receivable, Net of Deferred Income		593	670
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs		24	12
Loans and Leases Receivable, Net of Deferred Income		24	12
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs		0	20
Loans and Leases Receivable, Net of Deferred Income		0	20
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs		0	30
Loans and Leases Receivable, Net of Deferred Income		0	30
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs		1,174	1,636
Loans and Leases Receivable, Net of Deferred Income		1,174	1,636
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs		161	169
Loans and Leases Receivable, Net of Deferred Income		161	169
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs		294,775	288,121
Loans and Leases Receivable, Net of Deferred Income		294,775	288,121
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs		89,432	93,034
Loans and Leases Receivable, Net of Deferred Income		89,432	93,034
Consumer Portfolio Segment [Member]
Loans, net of deferred fees and costs		7,370	7,075
90 days past due and still accruing		21	15
Nonaccrual loans		0	3
Loans and Leases Receivable, Net of Deferred Income		7,370	7,075
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans, net of deferred fees and costs		3	6
Loans and Leases Receivable, Net of Deferred Income		3	6
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans, net of deferred fees and costs		0	0
Loans and Leases Receivable, Net of Deferred Income		0	0
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans, net of deferred fees and costs		24	24
Loans and Leases Receivable, Net of Deferred Income		24	24
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans, net of deferred fees and costs		7,346	7,051
Loans and Leases Receivable, Net of Deferred Income		$ 7,346	$ 7,051

[1] Derived from audited consolidated financial statements

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