Note 4 - Loans - Performing and Nonperforming Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Gross loans	$ 1,090,745	$ 1,139,732
Commercial Portfolio Segment [Member]
Gross loans	93,650	115,559
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
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	626,819	550,020
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	168,296	172,967
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
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	50,259	55,925
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	17,827	18,894
Consumer Portfolio Segment [Member]
Gross loans	17,430	21,969
Performing Financial Instruments [Member]
Gross loans	1,086,932	1,132,719
Performing Financial Instruments [Member] | Commercial Portfolio Segment [Member]
Gross loans	92,144	114,024
Performing Financial Instruments [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	59,058	130,814
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	30,494	44,549
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	626,213	549,380
Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	168,207	169,873
Performing Financial Instruments [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	25,449	27,450
Performing Financial Instruments [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	50,126	55,784
Performing Financial Instruments [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	17,827	18,894
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member]
Gross loans	17,414	21,951
Nonperforming Financial Instruments [Member]
Gross loans	3,813	7,013
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member]
Gross loans	1,506	1,535
Nonperforming Financial Instruments [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	0	0
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	0	0
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	606	640
Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	89	3,094
Nonperforming Financial Instruments [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	1,463	1,585
Nonperforming Financial Instruments [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	133	141
Nonperforming Financial Instruments [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	0	0
Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member]
Gross loans	$ 16	$ 18