Note 4 - Loans - Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021		Dec. 31, 2020
Loans, net of deferred fees and costs	$ 1,946,580		$ 2,015,056
90 days past due and still accruing	216		262
Nonaccrual loans	2,006		2,434
Loans and Leases Receivable, Net of Deferred Income, Total	1,946,580		2,015,056
Financial Asset, 30 to 59 Days Past Due [Member]
Loans, net of deferred fees and costs	808		1,143
Loans and Leases Receivable, Net of Deferred Income, Total	808		1,143
Financial Asset, 60 to 89 Days Past Due [Member]
Loans, net of deferred fees and costs	50		234
Loans and Leases Receivable, Net of Deferred Income, Total	50		234
Financial Asset, Past Due [Member]
Loans, net of deferred fees and costs	3,080		4,073
Loans and Leases Receivable, Net of Deferred Income, Total	3,080		4,073
Financial Asset, Not Past Due [Member]
Loans, net of deferred fees and costs	1,943,500		2,010,983
Loans and Leases Receivable, Net of Deferred Income, Total	1,943,500		2,010,983
Commercial Portfolio Segment [Member]
Loans, net of deferred fees and costs	299,773	[1]	491,256
90 days past due and still accruing	0		0
Nonaccrual loans	26		100
Loans and Leases Receivable, Net of Deferred Income, Total	299,773	[1]	491,256
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans, net of deferred fees and costs	120		153
Loans and Leases Receivable, Net of Deferred Income, Total	120		153
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans, net of deferred fees and costs	0		9
Loans and Leases Receivable, Net of Deferred Income, Total	0		9
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans, net of deferred fees and costs	146		262
Loans and Leases Receivable, Net of Deferred Income, Total	146		262
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans, net of deferred fees and costs	299,627		490,994
Loans and Leases Receivable, Net of Deferred Income, Total	299,627		490,994
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs	134,221		140,071
90 days past due and still accruing	0		0
Nonaccrual loans	0		5
Loans and Leases Receivable, Net of Deferred Income, Total	134,221		140,071
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs	391,517		373,680
90 days past due and still accruing	0		209
Nonaccrual loans	12		304
Loans and Leases Receivable, Net of Deferred Income, Total	391,517		373,680
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs	731,034		627,569
90 days past due and still accruing	0		0
Nonaccrual loans	1,093		1,158
Loans and Leases Receivable, Net of Deferred Income, Total	731,034		627,569
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		168
Loans and Leases Receivable, Net of Deferred Income, Total	0		168
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		62
Loans and Leases Receivable, Net of Deferred Income, Total	0		62
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, Total	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, Total	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, Total	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	0		0
Loans and Leases Receivable, Net of Deferred Income, Total	0		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		173
Loans and Leases Receivable, Net of Deferred Income, Total	0		173
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs	12		575
Loans and Leases Receivable, Net of Deferred Income, Total	12		575
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	1,093		1,158
Loans and Leases Receivable, Net of Deferred Income, Total	1,093		1,158
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs	134,221		139,898
Loans and Leases Receivable, Net of Deferred Income, Total	134,221		139,898
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	391,505		373,105
Loans and Leases Receivable, Net of Deferred Income, Total	391,505		373,105
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	729,941		626,411
Loans and Leases Receivable, Net of Deferred Income, Total	729,941		626,411
Residential Portfolio Segment [Member]
Loans, net of deferred fees and costs	382,960		374,018
Loans and Leases Receivable, Net of Deferred Income, Total	382,960		374,018
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs	731,034		627,569
Loans and Leases Receivable, Net of Deferred Income, Total	731,034		627,569
Residential Portfolio Segment [Member] | Residential [Member]
Loans, net of deferred fees and costs	289,757		269,137
90 days past due and still accruing	154		53
Nonaccrual loans	792		792
Loans and Leases Receivable, Net of Deferred Income, Total	289,757		269,137
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs	93,203		104,881
90 days past due and still accruing	47		0
Nonaccrual loans	80		69
Loans and Leases Receivable, Net of Deferred Income, Total	93,203		104,881
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs	670		711
Loans and Leases Receivable, Net of Deferred Income, Total	670		711
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	12		0
Loans and Leases Receivable, Net of Deferred Income, Total	12		0
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs	20		211
Loans and Leases Receivable, Net of Deferred Income, Total	20		211
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	30		0
Loans and Leases Receivable, Net of Deferred Income, Total	30		0
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs	1,636		1,767
Loans and Leases Receivable, Net of Deferred Income, Total	1,636		1,767
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs	169		69
Loans and Leases Receivable, Net of Deferred Income, Total	169		69
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Residential [Member]
Loans, net of deferred fees and costs	288,121		267,370
Loans and Leases Receivable, Net of Deferred Income, Total	288,121		267,370
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs	93,034		104,812
Loans and Leases Receivable, Net of Deferred Income, Total	93,034		104,812
Consumer Portfolio Segment [Member]
Loans, net of deferred fees and costs	7,075		8,462
90 days past due and still accruing	15		0
Nonaccrual loans	3		6
Loans and Leases Receivable, Net of Deferred Income, Total	7,075		8,462
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans, net of deferred fees and costs	6		49
Loans and Leases Receivable, Net of Deferred Income, Total	6		49
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans, net of deferred fees and costs	0		14
Loans and Leases Receivable, Net of Deferred Income, Total	0		14
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans, net of deferred fees and costs	24		69
Loans and Leases Receivable, Net of Deferred Income, Total	24		69
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans, net of deferred fees and costs	7,051		8,393
Loans and Leases Receivable, Net of Deferred Income, Total	$ 7,051		$ 8,393

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