Note 26 - Parent Company Financial Statements - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash	$ 47,365	$ 66,970	$ 68,407	$ 51,192
Investment in Bank of Commerce Holdings Trust II	310	310
Other assets	22,485	20,672
Total Assets	1,307,104	1,269,421
Bank of Commerce Holdings Trust II	10,310	10,310
Other liabilities	13,352	12,157
Total liabilities	1,168,783	1,142,157
Total liabilities and shareholders’ equity	1,307,104	1,269,421
Parent Company [Member]
Cash	19,425	23,984
Redding Bank of Commerce	143,078	130,658
Bank of Commerce Mortgage	(64)	(64)
Investment in Bank of Commerce Holdings Trust II	310	310
Other assets	157	169
Total Assets	162,906	155,057
Senior debt, net	3,494	7,090
Subordinated debt, net	9,911	9,868
Bank of Commerce Holdings Trust II	10,310	10,310
Other liabilities	870	525
Total liabilities	24,585	27,793
Shareholders’ equity	138,321	127,264
Total liabilities and shareholders’ equity	$ 162,906	$ 155,057