Note 2 - Loans and Allowance for Credit Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Originated five years prior	$ 58,862
Originated four years prior	101,163
Originated three years prior	204,428
Originated two years prior	149,465
Originated current year	22,622
Originated years prior	277,599
Revolving	43,098
Revolving loans converted to term	159
Gross loans	857,396		$ 853,193
Originated five years prior, write offs	12
Originated four years prior, write offs	0
Originated three years prior, write offs	7
Originated two years prior, write offs	43
Originated current year, write offs	0
Originated years prior, write offs	0
Revolving, write offs	30
Revolving loans converted to term, write offs	0
YTD gross charge-offs	92	$ 60	367
Loans, Collectively evaluated	853,266
Pass [Member]
Originated five years prior	58,826
Originated four years prior	101,136
Originated three years prior	204,134
Originated two years prior	149,458
Originated current year	22,622
Originated years prior	273,833
Revolving	43,098
Revolving loans converted to term	159
Gross loans	853,266
Loans, Collectively evaluated			848,768
Special Mention [Member]
Loans, Collectively evaluated			0
Classified Excluding Impaired [Member]
Originated five years prior	36
Originated four years prior	27
Originated three years prior	294
Originated two years prior	7
Originated current year	0
Originated years prior	3,766
Revolving	0
Revolving loans converted to term	0
Gross loans	4,130
Loans, Collectively evaluated			1,393
Real Estate Construction Portfolio Segment[Member]
Gross loans	54,052		54,579
Loans, Collectively evaluated	53,758		54,579
Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member]
Originated five years prior	0
Originated four years prior	213
Originated three years prior	1,370
Originated two years prior	5,000
Originated current year	554
Originated years prior	0
Revolving	6,006
Revolving loans converted to term	0
Gross loans	13,143
Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member] | Pass [Member]
Originated five years prior	0
Originated four years prior	213
Originated three years prior	1,370
Originated two years prior	5,000
Originated current year	554
Originated years prior	0
Revolving	6,006
Revolving loans converted to term	0
Gross loans	13,143
Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Gross loans	13,143		12,538
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Pass [Member]
Loans, Collectively evaluated			12,538
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member] | Classified Excluding Impaired [Member]
Loans, Collectively evaluated			0
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Originated five years prior	1,253
Originated four years prior	1,502
Originated three years prior	27,174
Originated two years prior	5,229
Originated current year	1,573
Originated years prior	2,807
Revolving	1,371
Revolving loans converted to term	0
Gross loans	40,909		42,041
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Pass [Member]
Originated five years prior	1,253
Originated four years prior	1,502
Originated three years prior	26,880
Originated two years prior	5,229
Originated current year	1,573
Originated years prior	2,807
Revolving	1,371
Revolving loans converted to term	0
Gross loans	40,615
Loans, Collectively evaluated			41,741
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	294
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	294
Loans, Collectively evaluated			300
Consumer Real Estate Portfolio Segment [Member]
Gross loans	223,438		221,052
YTD gross charge-offs	(0)	(0)	13
Loans, Collectively evaluated	222,377		220,866
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	53
Revolving	14,465
Revolving loans converted to term	8
Gross loans	14,526		15,026
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Pass [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	53
Revolving	14,465
Revolving loans converted to term	8
Gross loans	14,526
Loans, Collectively evaluated			15,026
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Loans, Collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Originated five years prior	6,191
Originated four years prior	15,494
Originated three years prior	32,829
Originated two years prior	27,691
Originated current year	4,381
Originated years prior	35,833
Revolving	0
Revolving loans converted to term	0
Gross loans	122,419		122,648
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Pass [Member]
Originated five years prior	6,191
Originated four years prior	15,467
Originated three years prior	32,829
Originated two years prior	27,691
Originated current year	4,381
Originated years prior	35,532
Revolving	0
Revolving loans converted to term	0
Gross loans	122,091
Loans, Collectively evaluated			122,187
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	27
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	301
Revolving	0
Revolving loans converted to term	0
Gross loans	328
Loans, Collectively evaluated			461
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Originated five years prior	7
Originated four years prior	0
Originated three years prior	87
Originated two years prior	405
Originated current year	82
Originated years prior	1,895
Revolving	0
Revolving loans converted to term	0
Gross loans	2,476		2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Pass [Member]
Originated five years prior	7
Originated four years prior	0
Originated three years prior	87
Originated two years prior	405
Originated current year	82
Originated years prior	1,895
Revolving	0
Revolving loans converted to term	0
Gross loans	2,476
Loans, Collectively evaluated			2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Loans, Collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Originated five years prior	5,379
Originated four years prior	15,052
Originated three years prior	20,412
Originated two years prior	14,414
Originated current year	2,301
Originated years prior	24,812
Revolving	1,547
Revolving loans converted to term	100
Gross loans	84,017		80,932
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Pass [Member]
Originated five years prior	5,379
Originated four years prior	15,052
Originated three years prior	20,412
Originated two years prior	14,414
Originated current year	2,301
Originated years prior	24,079
Revolving	1,547
Revolving loans converted to term	100
Gross loans	83,284
Loans, Collectively evaluated			80,143
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	733
Revolving	0
Revolving loans converted to term	0
Gross loans	733
Loans, Collectively evaluated			603
Commercial Real Estate Portfolio Segment [Member]
Gross loans	438,843		437,888
Loans, Collectively evaluated	436,363		435,305
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Originated five years prior	1,856
Originated four years prior	11,973
Originated three years prior	41,285
Originated two years prior	27,249
Originated current year	4,851
Originated years prior	44,731
Revolving	7
Revolving loans converted to term	0
Gross loans	131,952		127,312
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Pass [Member]
Originated five years prior	1,856
Originated four years prior	11,973
Originated three years prior	41,285
Originated two years prior	27,249
Originated current year	4,851
Originated years prior	44,731
Revolving	7
Revolving loans converted to term	0
Gross loans	131,952
Loans, Collectively evaluated			127,312
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Loans, Collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Originated five years prior	19,563
Originated four years prior	24,191
Originated three years prior	5,088
Originated two years prior	16,648
Originated current year	1,899
Originated years prior	57,471
Revolving	2,452
Revolving loans converted to term	50
Gross loans	127,362		129,133
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Pass [Member]
Originated five years prior	19,563
Originated four years prior	24,191
Originated three years prior	5,088
Originated two years prior	16,648
Originated current year	1,899
Originated years prior	54,991
Revolving	2,452
Revolving loans converted to term	50
Gross loans	124,882
Loans, Collectively evaluated			126,550
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	2,480
Revolving	0
Revolving loans converted to term	0
Gross loans	2,480
Loans, Collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Originated five years prior	22,410
Originated four years prior	19,838
Originated three years prior	36,961
Originated two years prior	23,541
Originated current year	262
Originated years prior	76,142
Revolving	375
Revolving loans converted to term	0
Gross loans	179,529		181,443
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Pass [Member]
Originated five years prior	22,410
Originated four years prior	19,838
Originated three years prior	36,961
Originated two years prior	23,541
Originated current year	262
Originated years prior	76,142
Revolving	375
Revolving loans converted to term	0
Gross loans	179,529
Loans, Collectively evaluated			181,443
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Loans, Collectively evaluated			0
Commercial Non Real Estate Segment [Member]
Gross loans	60,516		57,652
YTD gross charge-offs	12	(0)	2
Loans, Collectively evaluated	60,221		57,389
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Originated five years prior	1,100
Originated four years prior	10,123
Originated three years prior	15,106
Originated two years prior	8,966
Originated current year	2,258
Originated years prior	6,943
Revolving	16,020
Revolving loans converted to term	0
Gross loans	60,516		57,652
Originated five years prior, write offs	12
Originated four years prior, write offs	0
Originated three years prior, write offs	0
Originated two years prior, write offs	0
Originated current year, write offs	0
Originated years prior, write offs	0
Revolving, write offs	0
Revolving loans converted to term, write offs	0
YTD gross charge-offs	12
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Pass [Member]
Originated five years prior	1,064
Originated four years prior	10,123
Originated three years prior	15,106
Originated two years prior	8,959
Originated current year	2,258
Originated years prior	6,691
Revolving	16,020
Revolving loans converted to term	0
Gross loans	60,221
Loans, Collectively evaluated			57,381
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Classified Excluding Impaired [Member]
Originated five years prior	36
Originated four years prior	0
Originated three years prior	0
Originated two years prior	7
Originated current year	0
Originated years prior	252
Revolving	0
Revolving loans converted to term	0
Gross loans	295
Loans, Collectively evaluated			8
States Political Subdivisions [Member] | Pass [Member]
Loans, Collectively evaluated			48,074
States Political Subdivisions [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
States Political Subdivisions [Member] | Classified Excluding Impaired [Member]
Loans, Collectively evaluated			0
Consumer Non Real Estate Portfolio Segment [Member]
Gross loans	33,188		33,948
YTD gross charge-offs	80	$ 60	352
Loans, Collectively evaluated	33,188		33,948
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	4,563
Revolving loans converted to term	0
Gross loans	4,563		4,597
Originated five years prior, write offs	0
Originated four years prior, write offs	0
Originated three years prior, write offs	0
Originated two years prior, write offs	0
Originated current year, write offs	0
Originated years prior, write offs	0
Revolving, write offs	8
Revolving loans converted to term, write offs	0
YTD gross charge-offs	8
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Pass [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	4,563
Revolving loans converted to term	0
Gross loans	4,563
Loans, Collectively evaluated			4,597
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Loans, Collectively evaluated			0
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Originated five years prior	519
Originated four years prior	1,119
Originated three years prior	2,453
Originated two years prior	4,255
Originated current year	1,884
Originated years prior	173
Revolving	0
Revolving loans converted to term	0
Gross loans	10,403		9,935
Originated five years prior, write offs	0
Originated four years prior, write offs	0
Originated three years prior, write offs	1
Originated two years prior, write offs	30
Originated current year, write offs	0
Originated years prior, write offs	0
Revolving, write offs	0
Revolving loans converted to term, write offs	0
YTD gross charge-offs	31
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Pass [Member]
Originated five years prior	519
Originated four years prior	1,119
Originated three years prior	2,453
Originated two years prior	4,255
Originated current year	1,884
Originated years prior	173
Revolving	0
Revolving loans converted to term	0
Gross loans	10,403
Loans, Collectively evaluated			9,932
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Loans, Collectively evaluated			3
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Originated five years prior	543
Originated four years prior	1,412
Originated three years prior	3,245
Originated two years prior	9,416
Originated current year	2,577
Originated years prior	174
Revolving	855
Revolving loans converted to term	0
Gross loans	18,222		19,416
Originated five years prior, write offs	0
Originated four years prior, write offs	0
Originated three years prior, write offs	6
Originated two years prior, write offs	13
Originated current year, write offs	0
Originated years prior, write offs	0
Revolving, write offs	22
Revolving loans converted to term, write offs	0
YTD gross charge-offs	41
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Pass [Member]
Originated five years prior	543
Originated four years prior	1,412
Originated three years prior	3,245
Originated two years prior	9,416
Originated current year	2,577
Originated years prior	174
Revolving	855
Revolving loans converted to term	0
Gross loans	18,222
Loans, Collectively evaluated			19,398
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Special Mention [Member]
Loans, Collectively evaluated			0
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	0
Loans, Collectively evaluated			18
Public Sector and IDA Portfolio Segment[Member]
Originated five years prior	42
Originated four years prior	247
Originated three years prior	18,419
Originated two years prior	6,650
Originated current year	0
Originated years prior	22,001
Revolving	0
Revolving loans converted to term	0
Gross loans	47,359		48,074
Loans, Collectively evaluated	47,359		$ 48,074
Public Sector and IDA Portfolio Segment[Member] | Pass [Member]
Originated five years prior	42
Originated four years prior	247
Originated three years prior	18,419
Originated two years prior	6,650
Originated current year	0
Originated years prior	22,001
Revolving	0
Revolving loans converted to term	0
Gross loans	47,359
Public Sector and IDA Portfolio Segment[Member] | Classified Excluding Impaired [Member]
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Originated years prior	0
Revolving	0
Revolving loans converted to term	0
Gross loans	$ 0