Note 8 - Retail Loans by Credit Quality (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Total	$ 1,012,152	$ 1,039,637
Total Retail Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total		173,347
Performing Financial Instruments [Member] | Total Retail Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total		171,856
Nonperforming Financial Instruments [Member] | Total Retail Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total		1,491
Retail Portfolio Segment [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total		4,113
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
2023	3,029
2022	15,329
2021	33,433
2020	21,625
2019	4,797
Prior	28,545
Revolving	0
Total	106,758	105,654
Retail Portfolio Segment [Member] | Construction - Individual [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	152
2020	0
2019	0
Prior	0
Revolving	0
Total	152
Retail Portfolio Segment [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	34,454
Total	34,454
Retail Portfolio Segment [Member] | Real Estate Secured By First Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	639
2022	1,771
2021	3,486
2020	1,117
2019	1,109
Prior	2,575
Revolving	0
Total	10,697
Retail Portfolio Segment [Member] | Real Estate Secured By Junior Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	946
2022	1,887
2021	2,613
2020	1,510
2019	766
Prior	3,633
Revolving	0
Total	11,355
Retail Portfolio Segment [Member] | Student Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	1,917
Revolving	0
Total	1,917
Retail Portfolio Segment [Member] | Overdrafts [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	103
Total	103
Retail Portfolio Segment [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
2023	163
2022	474
2021	446
2020	175
2019	155
Prior	121
Revolving	202
Total	1,736
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member]
Financing Receivable Recorded Investment [Line Items]
Total		63,580
Retail Portfolio Segment [Member] | Total Retail Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2023	4,777
2022	19,461
2021	40,130
2020	24,427
2019	6,827
Prior	36,791
Revolving	34,759
Total	167,172
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total		4,023
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Family Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
2023	3,029
2022	15,329
2021	33,433
2020	21,625
2019	4,797
Prior	28,097
Revolving	0
Total	106,310	104,933
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Construction - Individual [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	152
2020	0
2019	0
Prior	0
Revolving	0
Total	152
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	34,271
Total	34,271
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Real Estate Secured By First Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	639
2022	1,771
2021	3,486
2020	1,117
2019	1,109
Prior	2,438
Revolving	0
Total	10,560
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Real Estate Secured By Junior Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	946
2022	1,887
2021	2,613
2020	1,510
2019	766
Prior	3,633
Revolving	0
Total	11,355
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Student Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	1,900
Revolving	0
Total	1,900
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Overdrafts [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	103
Total	103
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
2023	163
2022	474
2021	446
2020	175
2019	155
Prior	78
Revolving	202
Total	1,693
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Home Equity Loans and Lines [Member]
Financing Receivable Recorded Investment [Line Items]
Total		62,900
Retail Portfolio Segment [Member] | Performing Financial Instruments [Member] | Total Retail Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2023	4,777
2022	19,461
2021	40,130
2020	24,427
2019	6,827
Prior	36,146
Revolving	34,576
Total	166,344
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total		90
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Family Residential Mortgages [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	448
Revolving	0
Total	448	721
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Construction - Individual [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	0
Total	0
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Revolving Home Equity Secured By 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	183
Total	183
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Secured By First Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	137
Revolving	0
Total	137
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Real Estate Secured By Junior Lein on 1-4 Family Properties-Personal [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	0
Total	0
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Student Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	17
Revolving	0
Total	17
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Overdrafts [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving	0
Total	0
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Other Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	43
Revolving	0
Total	43
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Home Equity Loans and Lines [Member]
Financing Receivable Recorded Investment [Line Items]
Total		$ 680
Retail Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] | Total Retail Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2023	0
2022	0
2021
2020	0
2019	0
Prior	645
Revolving	183
Total	$ 828