Note 4 - Loans - Internal Risk Rating by Loan Class (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Gross loans	$ 1,145,943	$ 1,139,732
Commercial Portfolio Segment [Member]
Gross loans	117,597	115,559
SBA CARES Act Paycheck Protection Program [Member]
Gross loans	117,991	130,814
Commercial Real Estate Portfolio Segment [Member]
Gross loans	789,669	767,536
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	32,145	44,549
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	592,157	550,020
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	165,367	172,967
Residential Portfolio Segment [Member]
Gross loans	101,001	103,854
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	27,839	29,035
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	54,562	55,925
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	18,600	18,894
Consumer Portfolio Segment [Member]
Gross loans	19,685	21,969
Pass [Member]
Gross loans	1,005,025	1,004,688
Pass [Member] | Commercial Portfolio Segment [Member]
Gross loans	103,683	102,067
Pass [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	117,991	130,814
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	31,831	41,767
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	490,585	456,725
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	145,573	152,623
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	24,441	25,558
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	52,655	54,288
Pass [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	18,600	18,894
Pass [Member] | Consumer Portfolio Segment [Member]
Gross loans	19,666	21,952
Watch [Member]
Gross loans	83,491	105,316
Watch [Member] | Commercial Portfolio Segment [Member]
Gross loans	8,555	8,549
Watch [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	0	0
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	117	2,782
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	62,451	79,845
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	12,366	13,945
Watch [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	0	0
Watch [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	0	195
Watch [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	0	0
Watch [Member] | Consumer Portfolio Segment [Member]
Gross loans	2	0
Special Mention [Member]
Gross loans	33,836	13,764
Special Mention [Member] | Commercial Portfolio Segment [Member]
Gross loans	381	540
Special Mention [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	0	0
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	0	0
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	33,455	12,810
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	0	414
Special Mention [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	0	0
Special Mention [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	0	0
Special Mention [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	0	0
Special Mention [Member] | Consumer Portfolio Segment [Member]
Gross loans	0	0
Substandard [Member]
Gross loans	23,591	15,964
Substandard [Member] | Commercial Portfolio Segment [Member]
Gross loans	4,978	4,403
Substandard [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	0	0
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	197	0
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	5,666	640
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	7,428	5,985
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	3,398	3,477
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	1,907	1,442
Substandard [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	0	0
Substandard [Member] | Consumer Portfolio Segment [Member]
Gross loans	17	17
Doubtful [Member]
Gross loans	0	0
Doubtful [Member] | Commercial Portfolio Segment [Member]
Gross loans	0	0
Doubtful [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	0	0
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	0	0
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	0	0
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	0	0
Doubtful [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	0	0
Doubtful [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	0	0
Doubtful [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	0	0
Doubtful [Member] | Consumer Portfolio Segment [Member]
Gross loans	$ 0	$ 0