Note 2 - Loans and Allowance for Credit Losses - Loans by Credit Quality Indicators (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Originated more than five years prior	$ 254,991
Originated five years prior	48,667
Originated four years prior	88,606
Originated three years prior	192,216
Originated two years prior	149,421
Originated current year	69,014
Revolving	46,382
Revolving loans converted to term	120
Gross loans	849,417		$ 853,193
Originated more than five years prior, write-offs	0
Originated five years prior, write offs	11
Originated four years prior, write offs	17
Originated three years prior, write offs	20
YTD gross charge-offs	80
Originated current year, write offs	6
Revolving, write offs	98
Revolving loans converted to term, write offs	0
YTD gross charge-offs	232	$ 316	367
Loans, collectively evaluated	838,759
Pass [Member]
Originated more than five years prior	244,917
Originated five years prior	48,664
Originated four years prior	88,606
Originated three years prior	191,928
Originated two years prior	149,413
Originated current year	69,006
Revolving	46,105
Revolving loans converted to term	120
Gross loans	838,759
Loans, collectively evaluated			848,768
Special Mention [Member]
Originated more than five years prior	6,396
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	0
Revolving loans converted to term	0
Gross loans	6,396
Loans, collectively evaluated			0
Classified Excluding Impaired [Member]
Originated more than five years prior	3,678
Originated five years prior	3
Originated four years prior	0
Originated three years prior	288
Originated two years prior	8
Originated current year	8
Revolving	277
Revolving loans converted to term	0
Gross loans	4,262
Loans, collectively evaluated			1,393
Real Estate Construction Portfolio Segment[Member]
Gross loans	64,181		54,579
YTD gross charge-offs	(0)	(0)	(0)
Loans, collectively evaluated	63,893		54,579
Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member] | Pass [Member]
Originated more than five years prior	0
Originated five years prior	0
Originated four years prior	233
Originated three years prior	121
Originated two years prior	3,787
Originated current year	2,705
Revolving	10,149
Revolving loans converted to term	0
Gross loans	16,995
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Gross loans	16,995		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 more than five years prior	3,196
Originated five years prior	1,111
Originated four years prior	1,411
Originated three years prior	23,451
Originated two years prior	11,577
Originated current year	4,375
Revolving	2,065
Revolving loans converted to term	0
Gross loans	47,186		42,041
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member] | Pass [Member]
Originated more than five years prior	3,196
Originated five years prior	1,111
Originated four years prior	1,411
Originated three years prior	23,163
Originated two years prior	11,577
Originated current year	4,375
Revolving	2,065
Revolving loans converted to term	0
Gross loans	46,898
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 more than five years prior	0
Originated five years prior	0
Originated four years prior	0
Originated three years prior	288
Originated two years prior	0
Originated current year	0
Revolving	0
Revolving loans converted to term	0
Gross loans	288
Loans, collectively evaluated			300
Real Estate Construction Portfolio Segment[Member] | Equity Lines [Member]
Originated more than five years prior	53
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	16,595
Revolving loans converted to term	6
Gross loans	16,654
Real Estate Construction Portfolio Segment[Member] | Equity Lines [Member] | Classified Excluding Impaired [Member]
Originated more than five years prior	0
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	42
Revolving loans converted to term	0
Gross loans	42
Consumer Real Estate Portfolio Segment [Member]
Gross loans	226,671		221,052
YTD gross charge-offs	17	13	13
Loans, collectively evaluated	225,612		220,866
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Gross loans	16,654		15,026
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Pass [Member]
Originated more than five years prior	53
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	16,553
Revolving loans converted to term	6
Gross loans	16,612
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]
Loans, collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Originated more than five years prior	33,429
Originated five years prior	5,874
Originated four years prior	14,784
Originated three years prior	32,074
Originated two years prior	28,768
Revolving	0
Revolving loans converted to term	0
Gross loans	123,610		122,648
Originated more than five years prior, write-offs	0
Originated five years prior, write offs	0
Originated four years prior, write offs	17
Originated three years prior, write offs	0
YTD gross charge-offs	0
Originated current year, write offs	0
Revolving, write offs	0
Revolving loans converted to term, write offs	0
YTD gross charge-offs	17
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Pass [Member]
Originated more than five years prior	33,129
Originated five years prior	5,874
Originated four years prior	14,784
Originated three years prior	32,074
Originated two years prior	28,768
Originated current year	8,681
Revolving	0
Revolving loans converted to term	0
Gross loans	123,310
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 more than five years prior	300
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	0
Revolving loans converted to term	0
Gross loans	300
Loans, collectively evaluated			461
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Gross loans	5,022		2,446
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Pass [Member]
Originated more than five years prior	1,749
Originated five years prior	118
Originated four years prior	0
Originated three years prior	175
Originated two years prior	1,395
Originated current year	1,570
Revolving	0
Revolving loans converted to term	15
Gross loans	5,022
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]
Loans, collectively evaluated			0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Originated more than five years prior	23,858
Originated five years prior	5,215
Originated four years prior	14,348
Originated three years prior	19,475
Originated two years prior	13,888
Originated current year	3,093
Revolving	1,409
Revolving loans converted to term	99
Gross loans	81,385		80,932
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Pass [Member]
Originated more than five years prior	23,141
Originated five years prior	5,215
Originated four years prior	14,348
Originated three years prior	19,475
Originated two years prior	13,888
Originated current year	3,093
Revolving	1,409
Revolving loans converted to term	99
Gross loans	80,668
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 more than five years prior	717
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	0
Revolving loans converted to term	0
Gross loans	717
Loans, collectively evaluated			603
Consumer Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Originated more than five years prior	52,264
Originated five years prior	11,295
Originated four years prior	23,661
Originated three years prior	4,843
Originated two years prior	16,731
Originated current year	7,757
Revolving	2,255
Revolving loans converted to term	0
Gross loans	118,806
Consumer Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Classified Excluding Impaired [Member]
Originated more than five years prior	2,430
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	0
Revolving loans converted to term	0
Gross loans	2,430
Commercial Real Estate Portfolio Segment [Member]
Gross loans	424,765		437,888
YTD gross charge-offs	(0)	(0)	(0)
Loans, collectively evaluated	415,939		435,305
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Gross loans	133,188		127,312
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Pass [Member]
Originated more than five years prior	42,874
Originated five years prior	1,823
Originated four years prior	11,820
Originated three years prior	40,944
Originated two years prior	26,874
Originated current year	8,853
Revolving	0
Revolving loans converted to term	0
Gross loans	133,188
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]
Loans, collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Gross loans	118,806		129,133
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Pass [Member]
Originated more than five years prior	43,438
Originated five years prior	11,295
Originated four years prior	23,661
Originated three years prior	4,843
Originated two years prior	16,731
Originated current year	7,757
Revolving	2,255
Revolving loans converted to term	0
Gross loans	109,980
Loans, collectively evaluated			126,550
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Special Mention [Member]
Originated more than five years prior	6,396
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	0
Revolving loans converted to term	0
Gross loans	6,396
Loans, collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Classified Excluding Impaired [Member]
Loans, collectively evaluated			0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Gross loans	172,771		181,443
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Pass [Member]
Originated more than five years prior	70,064
Originated five years prior	22,033
Originated four years prior	19,300
Originated three years prior	36,272
Originated two years prior	22,600
Originated current year	1,957
Revolving	545
Revolving loans converted to term	0
Gross loans	172,771
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]
Loans, collectively evaluated			0
Commercial Non Real Estate Segment [Member]
Gross loans	42,940		57,652
YTD gross charge-offs	11	2	2
Loans, collectively evaluated	42,467		57,389
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Originated more than five years prior	6,331
Originated five years prior	494
Originated four years prior	1,189
Originated three years prior	13,059
Originated two years prior	7,446
Originated current year	6,634
Revolving	7,787
Revolving loans converted to term	0
Gross loans	42,940		57,652
Originated more than five years prior, write-offs	0
Originated five years prior, write offs	11
Originated four years prior, write offs	0
Originated three years prior, write offs	0
YTD gross charge-offs	0
Originated current year, write offs	0
Revolving, write offs	0
Revolving loans converted to term, write offs	0
YTD gross charge-offs	11
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Pass [Member]
Originated more than five years prior	6,100
Originated five years prior	494
Originated four years prior	1,189
Originated three years prior	13,059
Originated two years prior	7,439
Originated current year	6,634
Revolving	7,552
Revolving loans converted to term	0
Gross loans	42,467
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 more than five years prior	231
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	7
Originated current year	0
Revolving	235
Revolving loans converted to term	0
Gross loans	473
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	39,269		33,948
YTD gross charge-offs	204	301	352
Loans, collectively evaluated	39,257		33,948
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Gross loans	4,574		4,597
Originated more than five years prior, write-offs	0
Originated five years prior, write offs	0
Originated four years prior, write offs	0
Originated three years prior, write offs	0
YTD gross charge-offs	0
Originated current year, write offs	0
Revolving, write offs	35
Revolving loans converted to term, write offs	0
YTD gross charge-offs	35
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Pass [Member]
Originated more than five years prior	0
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	4,574
Revolving loans converted to term	0
Gross loans	4,574
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]
Loans, collectively evaluated			0
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Originated more than five years prior	95
Originated five years prior	310
Originated four years prior	680
Originated three years prior	1,846
Originated two years prior	3,146
Originated current year	5,900
Revolving	0
Revolving loans converted to term	0
Gross loans	11,977		9,935
Originated more than five years prior, write-offs	0
Originated five years prior, write offs	0
Originated four years prior, write offs	0
Originated three years prior, write offs	1
YTD gross charge-offs	38
Originated current year, write offs	0
Revolving, write offs	0
Revolving loans converted to term, write offs	0
YTD gross charge-offs	39
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Pass [Member]
Originated more than five years prior	95
Originated five years prior	307
Originated four years prior	680
Originated three years prior	1,846
Originated two years prior	3,146
Originated current year	5,900
Revolving	0
Revolving loans converted to term	0
Gross loans	11,974
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 more than five years prior	0
Originated five years prior	3
Originated four years prior	0
Originated three years prior	0
Originated two years prior	0
Originated current year	0
Revolving	0
Revolving loans converted to term	0
Gross loans	3
Loans, collectively evaluated			3
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Originated more than five years prior	136
Originated five years prior	380
Originated four years prior	941
Originated three years prior	2,273
Originated two years prior	6,771
Originated current year	11,214
Revolving	1,003
Revolving loans converted to term	0
Gross loans	22,718		19,416
Originated more than five years prior, write-offs	0
Originated five years prior, write offs	0
Originated four years prior, write offs	0
Originated three years prior, write offs	19
YTD gross charge-offs	42
Originated current year, write offs	6
Revolving, write offs	63
Revolving loans converted to term, write offs	0
YTD gross charge-offs	130
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Pass [Member]
Originated more than five years prior	136
Originated five years prior	380
Originated four years prior	941
Originated three years prior	2,273
Originated two years prior	6,770
Originated current year	11,206
Revolving	1,003
Revolving loans converted to term	0
Gross loans	22,709
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 more than five years prior	0
Originated five years prior	0
Originated four years prior	0
Originated three years prior	0
Originated two years prior	1
Originated current year	8
Revolving	0
Revolving loans converted to term	0
Gross loans	9
Loans, collectively evaluated			18
Public Sector and IDA Portfolio Segment[Member]
Gross loans	51,591		48,074
YTD gross charge-offs	(0)	$ (0)	(0)
Loans, collectively evaluated	51,591		$ 48,074
Public Sector and IDA Portfolio Segment[Member] | Pass [Member]
Originated more than five years prior	20,942
Originated five years prior	14
Originated four years prior	239
Originated three years prior	17,683
Originated two years prior	6,438
Originated current year	6,275
Revolving	0
Revolving loans converted to term	0
Gross loans	$ 51,591