Note 4 - Loans - Age Analysis of Past Due Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Gross loans		$ 1,090,745	$ 1,139,732
Recorded investment greater than 90 days and accruing		0	0
SBA CARES Act Paycheck Protection Program [Member]
Gross loans	[1]	59,058	130,814
Financial Asset, 30 to 59 Days Past Due [Member]
Gross loans		322	822
Financial Asset, 60 to 89 Days Past Due [Member]
Gross loans		17	17
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		1,535	4,575
Financial Asset, Past Due [Member]
Gross loans		1,874	5,414
Financial Asset, Not Past Due [Member]
Gross loans		1,088,871	1,134,318
Commercial Portfolio Segment [Member]
Gross loans		93,650	115,559
Recorded investment greater than 90 days and accruing		0	0
Commercial Portfolio Segment [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans		59,058	130,814
Recorded investment greater than 90 days and accruing		0
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Gross loans		89	0
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans		0	0
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Gross loans		0	0
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans		0	0
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		1,413	1,413
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans		0	0
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Gross loans		1,502	1,413
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans		0	0
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Gross loans		92,148	114,146
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans		59,058	130,814
Commercial Real Estate Portfolio Segment [Member]
Gross loans		825,609	767,536
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans		30,494	44,549
Recorded investment greater than 90 days and accruing		0	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans		626,819	550,020
Recorded investment greater than 90 days and accruing		0	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans		168,296	172,967
Recorded investment greater than 90 days and accruing		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Non-owner Occupied [Member]
Gross loans		0	640
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Owner Occupied Loan [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Non-owner Occupied [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Owner Occupied Loan [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Non-owner Occupied [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Owner Occupied Loan [Member]
Gross loans		0	2,993
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]
Gross loans		0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Commercial Non-owner Occupied [Member]
Gross loans		0	640
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Commercial Owner Occupied Loan [Member]
Gross loans		0	2,993
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Gross loans		30,494	44,549
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Commercial Non-owner Occupied [Member]
Gross loans		626,819	549,380
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Commercial Owner Occupied Loan [Member]
Gross loans		168,296	169,974
Residential Portfolio Segment [Member]
Gross loans		94,998	103,854
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans		26,912	29,035
Recorded investment greater than 90 days and accruing		0	0
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans		50,259	55,925
Recorded investment greater than 90 days and accruing		0	0
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans		17,827	18,894
Recorded investment greater than 90 days and accruing		0	0
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans		171	40
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans		0	0
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Loan [Member]
Gross loans		0	60
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans		0	0
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans		0	0
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Loan [Member]
Gross loans		0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans		122	169
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans		0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Loan [Member]
Gross loans		0	0
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans		293	209
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans		0	0
Residential Portfolio Segment [Member] | Financial Asset, Past Due [Member] | Home Equity Loan [Member]
Gross loans		0	60
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans		26,619	28,826
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans		50,259	55,925
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] | Home Equity Loan [Member]
Gross loans		17,827	18,834
Consumer Portfolio Segment [Member]
Gross loans		17,430	21,969
Recorded investment greater than 90 days and accruing		0	0
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Gross loans		62	82
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Gross loans		17	17
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Gross loans		0	0
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Gross loans		79	99
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Gross loans		$ 17,351	$ 21,870

[1] PPP loans are fully guaranteed by SBA and no allowance is provided for them.