Note 3 - Loans - Credit Risk Profile (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Loans, net of deferred fees and costs		$ 2,199,517		$ 2,186,449	[1]
Charge-offs		(395)	$ (37)	(1,019)
Gross loans		2,199,517		2,186,449	[1]
Commercial Portfolio Segment [Member]
Loans, current year		9,478
Loans, one year before		48,887
Loans, two years before		64,003
Loans, three years before		23,678
Loans, four years before		13,601
Loans, prior		36,723
Loans, revolving		108,116
Loans, net of deferred fees and costs		304,486		304,247
Current period gross write-offs, current		0
Current period gross write-offs, one year before		0
Current period gross write-offs, two years before		(360)
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		0
Current period gross write-offs, revolving		0
Charge-offs	[2]	(360)		(357)
Gross loans		304,486		304,247
Commercial Portfolio Segment [Member] | Pass [Member]
Loans, current year		9,472
Loans, one year before		47,620
Loans, two years before		62,685
Loans, three years before		23,580
Loans, four years before		12,498
Loans, prior		33,723
Loans, revolving		99,913
Loans, net of deferred fees and costs		289,491		288,041
Gross loans		289,491		288,041
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans, current year		0
Loans, one year before		1,267
Loans, two years before		1,318
Loans, three years before		98
Loans, four years before		647
Loans, prior		1,753
Loans, revolving		5,181
Loans, net of deferred fees and costs		10,264		10,657
Gross loans		10,264		10,657
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans, current year		6
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		456
Loans, prior		1,247
Loans, revolving		3,022
Loans, net of deferred fees and costs		4,731		5,548
Gross loans		4,731		5,548
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans, net of deferred fees and costs				1
Gross loans				1
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Loans, current year		3,184
Loans, one year before		77,396
Loans, two years before		96,857
Loans, three years before		8,539
Loans, four years before		5,420
Loans, prior		18,073
Loans, revolving		6,506
Loans, net of deferred fees and costs		215,975		197,525
Current period gross write-offs, current		0
Current period gross write-offs, one year before		0
Current period gross write-offs, two years before		0
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		0
Current period gross write-offs, revolving		0
Charge-offs		0
Gross loans		215,975		197,525
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, current year		7,835
Loans, one year before		60,675
Loans, two years before		106,037
Loans, three years before		47,327
Loans, four years before		26,980
Loans, prior		157,732
Loans, revolving		8,520
Loans, net of deferred fees and costs		415,106		418,462
Current period gross write-offs, current		0
Current period gross write-offs, one year before		0
Current period gross write-offs, two years before		0
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		0
Current period gross write-offs, revolving		0
Charge-offs		0		0
Gross loans		415,106		418,462
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, current year		6,240
Loans, one year before		142,424
Loans, two years before		199,730
Loans, three years before		138,967
Loans, four years before		90,658
Loans, prior		236,710
Loans, revolving		7,618
Loans, net of deferred fees and costs		822,347		827,728
Current period gross write-offs, current		0
Current period gross write-offs, one year before		0
Current period gross write-offs, two years before		0
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		0
Current period gross write-offs, revolving		0
Charge-offs		0		(436)
Gross loans		822,347		827,728
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction and Land Development [Member]
Loans, current year		3,184
Loans, one year before		76,316
Loans, two years before		96,857
Loans, three years before		8,539
Loans, four years before		5,420
Loans, prior		18,073
Loans, revolving		6,506
Loans, net of deferred fees and costs		214,895		197,331
Gross loans		214,895		197,331
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, current year		6,556
Loans, one year before		60,675
Loans, two years before		104,240
Loans, three years before		44,728
Loans, four years before		26,980
Loans, prior		151,305
Loans, revolving		6,179
Loans, net of deferred fees and costs		400,663		405,223
Gross loans		400,663		405,223
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, current year		6,240
Loans, one year before		142,424
Loans, two years before		199,730
Loans, three years before		138,967
Loans, four years before		89,430
Loans, prior		230,905
Loans, revolving		7,618
Loans, net of deferred fees and costs		815,314
Gross loans		815,314
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction and Land Development [Member]
Loans, current year		0
Loans, one year before		1,080
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		0
Loans, net of deferred fees and costs		1,080		0
Gross loans		1,080		0
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		1,437
Loans, three years before		236
Loans, four years before		0
Loans, prior		829
Loans, revolving		0
Loans, net of deferred fees and costs		2,502		2,388
Gross loans		2,502		2,388
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		913
Loans, prior		5,486
Loans, revolving		0
Loans, net of deferred fees and costs		6,399
Gross loans		6,399
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction and Land Development [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		0
Loans, net of deferred fees and costs		0		194
Gross loans		0		194
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, current year		1,279
Loans, one year before		0
Loans, two years before		360
Loans, three years before		2,363
Loans, four years before		0
Loans, prior		5,598
Loans, revolving		2,341
Loans, net of deferred fees and costs		11,941		10,851
Gross loans		11,941		10,851
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		315
Loans, prior		319
Loans, revolving		0
Loans, net of deferred fees and costs		634
Gross loans		634
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction and Land Development [Member]
Loans, net of deferred fees and costs				0
Gross loans				0
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs				0
Gross loans				0
Residential Portfolio Segment [Member]
Charge-offs				(5)
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs				827,728
Gross loans				827,728
Residential Portfolio Segment [Member] | Residential [Member]
Loans, current year		16,621
Loans, one year before		104,608
Loans, two years before		91,469
Loans, three years before		26,770
Loans, four years before		15,831
Loans, prior		75,075
Loans, revolving		13,174
Loans, net of deferred fees and costs		343,548		338,132
Current period gross write-offs, current		0
Current period gross write-offs, one year before		0
Current period gross write-offs, two years before		0
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		0
Current period gross write-offs, revolving		0
Charge-offs		0
Gross loans		343,548		338,132
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		91,408
Loans, net of deferred fees and costs		91,408		93,740
Current period gross write-offs, current		0
Current period gross write-offs, one year before		0
Current period gross write-offs, two years before		0
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		0
Current period gross write-offs, revolving		0
Charge-offs		0
Gross loans		91,408		93,740
Residential Portfolio Segment [Member] | Pass [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs				826,844
Gross loans				826,844
Residential Portfolio Segment [Member] | Pass [Member] | Residential [Member]
Loans, current year		16,621
Loans, one year before		104,345
Loans, two years before		90,511
Loans, three years before		26,636
Loans, four years before		15,322
Loans, prior		72,176
Loans, revolving		13,107
Loans, net of deferred fees and costs		338,718		333,124
Gross loans		338,718		333,124
Residential Portfolio Segment [Member] | Pass [Member] | Home Equity Line of Credit [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		90,730
Loans, net of deferred fees and costs		90,730		93,062
Gross loans		90,730		93,062
Residential Portfolio Segment [Member] | Special Mention [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs				239
Gross loans				239
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential [Member]
Loans, current year		0
Loans, one year before		263
Loans, two years before		206
Loans, three years before		0
Loans, four years before		321
Loans, prior		827
Loans, revolving		0
Loans, net of deferred fees and costs		1,617		1,577
Gross loans		1,617		1,577
Residential Portfolio Segment [Member] | Special Mention [Member] | Home Equity Line of Credit [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		0
Loans, net of deferred fees and costs		0		0
Gross loans		0		0
Residential Portfolio Segment [Member] | Substandard [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs				645
Gross loans				645
Residential Portfolio Segment [Member] | Substandard [Member] | Residential [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		752
Loans, three years before		134
Loans, four years before		188
Loans, prior		2,072
Loans, revolving		67
Loans, net of deferred fees and costs		3,213		3,431
Gross loans		3,213		3,431
Residential Portfolio Segment [Member] | Substandard [Member] | Home Equity Line of Credit [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		678
Loans, net of deferred fees and costs		678		678
Gross loans		678		678
Residential Portfolio Segment [Member] | Doubtful [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, net of deferred fees and costs				0
Gross loans				0
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential [Member]
Loans, net of deferred fees and costs				0
Gross loans				0
Residential Portfolio Segment [Member] | Doubtful [Member] | Home Equity Line of Credit [Member]
Loans, net of deferred fees and costs				0
Gross loans				0
Consumer Portfolio Segment [Member]
Loans, current year		1,004
Loans, one year before		1,965
Loans, two years before		794
Loans, three years before		403
Loans, four years before		224
Loans, prior		1,824
Loans, revolving		433
Loans, net of deferred fees and costs		6,647		6,615
Current period gross write-offs, current		0
Current period gross write-offs, one year before		0
Current period gross write-offs, two years before		(5)
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		(30)
Current period gross write-offs, revolving		0
Charge-offs		(35)		(221)
Gross loans		6,647		6,615
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans, net of deferred fees and costs				6,599
Gross loans				6,599
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans, net of deferred fees and costs				16
Gross loans				$ 16
Consumer Portfolio Segment [Member] | Pass [Member]
Loans, current year		1,004
Loans, one year before		1,962
Loans, two years before		794
Loans, three years before		403
Loans, four years before		224
Loans, prior		1,804
Loans, revolving		432
Loans, net of deferred fees and costs		6,623
Gross loans		6,623
Consumer Portfolio Segment [Member] | Special Mention [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		0
Loans, net of deferred fees and costs		0
Gross loans		0
Consumer Portfolio Segment [Member] | Substandard [Member]
Loans, current year		0
Loans, one year before		3
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		20
Loans, revolving		1
Loans, net of deferred fees and costs		24
Gross loans		$ 24

[1] Derived from audited consolidated financial statements

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