Note 3 - Loans - Credit Risk Profile (Details) - USD ($) $ in Thousands	Sep. 30, 2021		Dec. 31, 2020
Loans and Leases Receivable, Net of Deferred Income, Total	$ 1,940,332		$ 2,015,056
Commercial Portfolio Segment [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	320,278	[1]	491,256
Commercial Portfolio Segment [Member] | Pass [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	311,207		479,416
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	8,466		10,956
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	605		865
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	0		19
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	120,193		140,071
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	404,029		373,680
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	713,339		627,569
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	115,975		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	383,787		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	2,933		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	11,840		14,621
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	1,285		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	8,402		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	375,668		374,018
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	713,339		627,569
Residential Portfolio Segment [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	280,351		269,137
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	95,317		104,881
Residential Portfolio Segment [Member] | Pass [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	697,632		612,688
Residential Portfolio Segment [Member] | Pass [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	275,172		262,677
Residential Portfolio Segment [Member] | Pass [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	94,941		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	8,880		9,196
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	2,375		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	6,827		5,563
Residential Portfolio Segment [Member] | Substandard [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	2,804		2,795
Residential Portfolio Segment [Member] | Substandard [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	376		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	6,825		8,462
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	6,824		8,456
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	$ 1		$ 6

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