Note 5 - Loans - Internal Risk Rating by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Gross loans	$ 1,139,732	$ 1,032,903
Commercial Portfolio Segment [Member]
Gross loans	115,559	141,197
SBA CARES Act Paycheck Protection Program [Member]
Gross loans	130,814	0
Commercial Real Estate Portfolio Segment [Member]
Gross loans	767,536	739,583
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	44,549	26,830
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	512,832	493,920
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	210,155	218,833
Residential Portfolio Segment [Member]
Gross loans	103,854	118,799
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	29,035	33,039
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	55,925	63,661
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	18,894	22,099
Consumer Portfolio Segment [Member]
Gross loans	21,969	33,324
Pass [Member]
Gross loans	1,004,688	948,864
Pass [Member] | Commercial Portfolio Segment [Member]
Gross loans	102,067	125,222
Pass [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	130,814
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	41,767	26,810
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	453,930	454,493
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	155,418	195,950
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	25,558	28,609
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	54,288	62,485
Pass [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	18,894	22,012
Pass [Member] | Consumer Portfolio Segment [Member]
Gross loans	21,952	33,283
Watch [Member]
Gross loans	105,316	56,105
Watch [Member] | Commercial Portfolio Segment [Member]
Gross loans	8,549	14,974
Watch [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	0
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	2,782	20
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	46,092	32,902
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	47,698	7,224
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	195	985
Watch [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	0	0
Watch [Member] | Consumer Portfolio Segment [Member]
Gross loans	0	0
Special Mention [Member]
Gross loans	13,764	7,477
Special Mention [Member] | Commercial Portfolio Segment [Member]
Gross loans	540	833
Special Mention [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	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	12,810	5,424
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	414	1,220
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	15,964	20,457
Substandard [Member] | Commercial Portfolio Segment [Member]
Gross loans	4,403	168
Substandard [Member] | SBA CARES Act Paycheck Protection Program [Member]
Gross loans	0
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	0	0
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	0	1,101
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	6,625	14,439
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	3,477	4,430
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	1,442	191
Substandard [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	0	87
Substandard [Member] | Consumer Portfolio Segment [Member]
Gross loans	17	41
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
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