Note 8 - Other Assets - Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank of San Francisco stock	$ 7,380	$ 5,892
Qualified Zone Academy Bonds	4,740	4,740
Interest receivable	4,678	4,609
Right-of-use lease	3,464
Investments in affordable housing partnerships	2,529	3,020
Income taxes receivable	1,925	541
Investment in CRA fund	1,066	1,036
Prepaid expenses	991	1,075
SBA payments in process	701	411
Loan servicing receivables	415	625
Investment in Bank of Commerce Holdings Trust II	310	310
Other	354	226
Total	$ 28,553	$ 22,485