Note 8 - Loans and Related Allowance for Loan and Lease Losses - Classes of the Loan Portfolio Summarized by Credit Quality (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Loans	$ 1,124,396	$ 984,258
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Loan [Member]
Loans	107,342	102,386
Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member]
Loans	310,512	302,180
Commercial Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member]
Loans	39,622	62,028
Residential Portfolio Segment [Member]
Loans	222,237	234,798
Commercial And Industrial [Member]
Loans	258,313	89,527
Home Equity Lines of Credit [Member]
Loans	115,223	112,248
Construction and Other [Member]
Loans	60,613	66,680
Consumer Portfolio Segment [Member]
Loans	10,534	14,411
Pass [Member]
Loans	1,081,056	957,939
Pass [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Loan [Member]
Loans	101,389	95,518
Pass [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member]
Loans	283,379	292,192
Pass [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member]
Loans	39,622	62,028
Pass [Member] \| Residential Portfolio Segment [Member]
Loans	218,450	231,633
Pass [Member] \| Commercial And Industrial [Member]
Loans	253,197	84,136
Pass [Member] \| Home Equity Lines of Credit [Member]
Loans	113,884	111,354
Pass [Member] \| Construction and Other [Member]
Loans	60,613	66,680
Pass [Member] \| Consumer Portfolio Segment [Member]
Loans	10,522	14,398
Special Mention [Member]
Loans	8,402	11,028
Special Mention [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Loan [Member]
Loans	3,751	3,951
Special Mention [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member]
Loans	1,761	3,038
Special Mention [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member]
Loans	0	0
Special Mention [Member] \| Residential Portfolio Segment [Member]
Loans	270	420
Special Mention [Member] \| Commercial And Industrial [Member]
Loans	2,620	3,619
Special Mention [Member] \| Home Equity Lines of Credit [Member]
Loans	0	0
Special Mention [Member] \| Construction and Other [Member]
Loans	0	0
Special Mention [Member] \| Consumer Portfolio Segment [Member]
Loans	0	0
Substandard [Member]
Loans	34,938	15,291
Substandard [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Loan [Member]
Loans	2,202	2,917
Substandard [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member]
Loans	25,372	6,950
Substandard [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member]
Loans	0	0
Substandard [Member] \| Residential Portfolio Segment [Member]
Loans	3,517	2,745
Substandard [Member] \| Commercial And Industrial [Member]
Loans	2,496	1,772
Substandard [Member] \| Home Equity Lines of Credit [Member]
Loans	1,339	894
Substandard [Member] \| Construction and Other [Member]
Loans	0	0
Substandard [Member] \| Consumer Portfolio Segment [Member]
Loans	12	13
Doubtful [Member]
Loans	0	0
Doubtful [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied Loan [Member]
Loans	0	0
Doubtful [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member]
Loans	0	0
Doubtful [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Multifamily Loan [Member]
Loans	0	0
Doubtful [Member] \| Residential Portfolio Segment [Member]
Loans	0	0
Doubtful [Member] \| Commercial And Industrial [Member]
Loans	0	0
Doubtful [Member] \| Home Equity Lines of Credit [Member]
Loans	0	0
Doubtful [Member] \| Construction and Other [Member]
Loans	0	0
Doubtful [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 0	$ 0

Note 8 - Loans and Related Allowance for Loan and Lease Losses - Classes of the Loan Portfolio Summarized by Credit Quality (Details) - USD ($)
$ in Thousands