Note 4 - Loans - Credit Risk Profile (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loans, net of deferred fees and costs		$ 2,288,320	$ 2,186,449
Current period gross write-offs, total		(1,002)	(1,019)	$ (146)
Gross loans		2,288,320	2,186,449
Commercial Portfolio Segment [Member]
Loans, current year		40,307
Loans, one year before		38,229
Loans, two years before		55,800
Loans, three years before		18,353
Loans, four years before		9,596
Loans, prior		26,835
Loans, revolving		113,185
Loans, net of deferred fees and costs		302,305	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		(359)
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		(535)
Current period gross write-offs, total	[1]	(894)	(357)
Gross loans		302,305	304,247
Commercial Portfolio Segment [Member] | Pass [Member]
Loans, current year		38,996
Loans, one year before		37,024
Loans, two years before		53,730
Loans, three years before		18,292
Loans, four years before		8,886
Loans, prior		24,380
Loans, revolving		109,050
Loans, net of deferred fees and costs		290,358	288,041
Gross loans		290,358	288,041
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans, current year		1,311
Loans, one year before		1,071
Loans, two years before		2,054
Loans, three years before		61
Loans, four years before		386
Loans, prior		65
Loans, revolving		1,801
Loans, net of deferred fees and costs		6,749	10,657
Gross loans		6,749	10,657
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans, current year		0
Loans, one year before		134
Loans, two years before		16
Loans, three years before		0
Loans, four years before		324
Loans, prior		2,390
Loans, revolving		2,334
Loans, net of deferred fees and costs		5,198	5,548
Gross loans		5,198	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		51,120
Loans, one year before		83,122
Loans, two years before		104,756
Loans, three years before		7,462
Loans, four years before		5,296
Loans, prior		16,216
Loans, revolving		6,063
Loans, net of deferred fees and costs		274,035	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
Current period gross write-offs, total		0
Gross loans		274,035	197,525
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, current year		32,233
Loans, one year before		60,890
Loans, two years before		99,744
Loans, three years before		45,286
Loans, four years before		23,733
Loans, prior		142,244
Loans, revolving		10,191
Loans, net of deferred fees and costs		414,321	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
Current period gross write-offs, total		0	0
Gross loans		414,321	418,462
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, current year		50,337
Loans, one year before		144,118
Loans, two years before		220,823
Loans, three years before		131,326
Loans, four years before		59,752
Loans, prior		217,963
Loans, revolving		6,336
Loans, net of deferred fees and costs		830,655	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
Current period gross write-offs, total		0	(436)
Gross loans		830,655	827,728
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction and Land Development [Member]
Loans, current year		51,120
Loans, one year before		83,122
Loans, two years before		100,392
Loans, three years before		7,462
Loans, four years before		5,296
Loans, prior		16,116
Loans, revolving		6,063
Loans, net of deferred fees and costs		269,571	197,331
Gross loans		269,571	197,331
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, current year		32,233
Loans, one year before		60,890
Loans, two years before		98,415
Loans, three years before		42,971
Loans, four years before		23,733
Loans, prior		138,802
Loans, revolving		5,208
Loans, net of deferred fees and costs		402,252	405,223
Gross loans		402,252	405,223
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, current year		47,264
Loans, one year before		144,118
Loans, two years before		219,493
Loans, three years before		129,747
Loans, four years before		56,852
Loans, prior		209,351
Loans, revolving		6,336
Loans, net of deferred fees and costs		813,161
Gross loans		813,161
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction and Land Development [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		4,364
Loans, three years before		0
Loans, four years before		0
Loans, prior		0
Loans, revolving		0
Loans, net of deferred fees and costs		4,364	0
Gross loans		4,364	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		1,329
Loans, three years before		0
Loans, four years before		0
Loans, prior		788
Loans, revolving		4,529
Loans, net of deferred fees and costs		6,646	2,388
Gross loans		6,646	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		121
Loans, four years before		1,034
Loans, prior		6,960
Loans, revolving		0
Loans, net of deferred fees and costs		8,115
Gross loans		8,115
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		100
Loans, revolving		0
Loans, net of deferred fees and costs		100	194
Gross loans		100	194
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate [Member]
Loans, current year		0
Loans, one year before		0
Loans, two years before		0
Loans, three years before		2,315
Loans, four years before		0
Loans, prior		2,654
Loans, revolving		454
Loans, net of deferred fees and costs		5,423	10,851
Gross loans		5,423	10,851
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans, current year		3,073
Loans, one year before		0
Loans, two years before		1,330
Loans, three years before		1,458
Loans, four years before		1,866
Loans, prior		1,652
Loans, revolving		0
Loans, net of deferred fees and costs		9,379
Gross loans		9,379
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]
Current period gross write-offs, total			(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		74,488
Loans, one year before		94,185
Loans, two years before		83,835
Loans, three years before		23,866
Loans, four years before		14,226
Loans, prior		64,911
Loans, revolving		14,381
Loans, net of deferred fees and costs		369,892	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		(6)
Current period gross write-offs, revolving		0
Current period gross write-offs, total		(6)
Gross loans		369,892	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		90,298
Loans, net of deferred fees and costs		90,298	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		(9)
Current period gross write-offs, total		(9)
Gross loans		90,298	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		74,488
Loans, one year before		93,929
Loans, two years before		83,377
Loans, three years before		23,637
Loans, four years before		14,226
Loans, prior		63,336
Loans, revolving		14,381
Loans, net of deferred fees and costs		367,374	333,124
Gross loans		367,374	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		89,872
Loans, net of deferred fees and costs		89,872	93,062
Gross loans		89,872	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		256
Loans, two years before		199
Loans, three years before		0
Loans, four years before		0
Loans, prior		757
Loans, revolving		0
Loans, net of deferred fees and costs		1,212	1,577
Gross loans		1,212	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		259
Loans, three years before		229
Loans, four years before		0
Loans, prior		818
Loans, revolving		0
Loans, net of deferred fees and costs		1,306	3,431
Gross loans		1,306	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		426
Loans, net of deferred fees and costs		426	678
Gross loans		426	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		2,452
Loans, one year before		1,278
Loans, two years before		477
Loans, three years before		225
Loans, four years before		141
Loans, prior		1,732
Loans, revolving		509
Loans, net of deferred fees and costs		6,814	6,615
Current period gross write-offs, current		(3)
Current period gross write-offs, one year before		(2)
Current period gross write-offs, two years before		(7)
Current period gross write-offs, three years before		0
Current period gross write-offs, four years before		0
Current period gross write-offs, prior		(78)
Current period gross write-offs, revolving		(3)
Current period gross write-offs, total		(93)	(221)
Gross loans		6,814	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		2,452
Loans, one year before		1,276
Loans, two years before		477
Loans, three years before		225
Loans, four years before		141
Loans, prior		1,717
Loans, revolving		509
Loans, net of deferred fees and costs		6,797
Gross loans		6,797
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		2
Loans, two years before		0
Loans, three years before		0
Loans, four years before		0
Loans, prior		15
Loans, revolving		0
Loans, net of deferred fees and costs		17
Gross loans		$ 17

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