Note 3 - Loans - Credit Risk Profile (Details) - USD ($) $ in Thousands	Mar. 31, 2021		Dec. 31, 2020
Loans and Leases Receivable, Net of Deferred Income, Total	$ 1,978,640		$ 2,015,056
Commercial Portfolio Segment [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	447,109	[1]	491,256
Commercial Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	437,092		479,416
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	9,238		10,956
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	778		865
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	1		19
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	159,801		140,071
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	364,549		373,680
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	628,742		627,569
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	152,327		131,770
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	342,078		350,376
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	3,155		2,505
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	14,983		14,621
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	4,319		5,796
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	7,488		8,474
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	0		0
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	0		209
Residential Portfolio Segment [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	367,238		374,018
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	628,742		627,569
Residential Portfolio Segment [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	266,595		269,137
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	100,643		104,881
Residential Portfolio Segment [Member] | Pass [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	611,473		612,688
Residential Portfolio Segment [Member] | Pass [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	260,207		262,677
Residential Portfolio Segment [Member] | Pass [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	100,251		104,608
Residential Portfolio Segment [Member] | Special Mention [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	9,555		9,196
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	3,376		3,665
Residential Portfolio Segment [Member] | Special Mention [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	0		0
Residential Portfolio Segment [Member] | Substandard [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	7,714		5,563
Residential Portfolio Segment [Member] | Substandard [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	3,012		2,795
Residential Portfolio Segment [Member] | Substandard [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	392		273
Residential Portfolio Segment [Member] | Doubtful [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	0		122
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	0		0
Residential Portfolio Segment [Member] | Doubtful [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	0		0
Consumer Portfolio Segment [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	11,201		8,462
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	11,194		8,456
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	$ 7		$ 6

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