Note 5 - Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	$ 927,147	$ 921,856
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	3,468	3,489
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	12	341
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	763	1,870
Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	4,243	5,700
Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	922,904	916,156
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	148,610	227,431
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	2,288	2,392
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1	31
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	596	1,157
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	2,885	3,580
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	145,725	223,851
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	55,855	57,594
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	55,855	57,594
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	451,404	377,586
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	318
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	40
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	358
Commercial Portfolio Segment [Member] | Secured by Commercial Real Estate [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	451,404	377,228
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	84,741	81,897
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	189
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	30	340
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	30	529
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	84,711	81,368
State and Political Subdivisions Portfolio Segment [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	19,775	25,302
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
State and Political Subdivisions Portfolio Segment [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	19,775	25,302
Retail Portfolio Segment [Member] | Consumer Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	4,699	5,364
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	20	178
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	11	5
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	0
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	31	183
Retail Portfolio Segment [Member] | Consumer Loans [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	4,668	5,181
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	100,281	82,739
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,139	396
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	303
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	127	282
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,266	981
Retail Portfolio Segment [Member] | Family Residential Mortgages [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	99,015	81,758
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	61,782	63,943
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	21	16
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	0	2
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	10	51
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Financing Receivables, Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	31	69
Retail Portfolio Segment [Member] | Home Equity Loans and Lines [Member] | Current Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	$ 61,751	$ 63,874