Note 11 - Commitments and Contingencies - Summary of the Bank's Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Commitments to Extend Credit [Member]
Commitments	$ 216,817	$ 224,757
Standby Letters of Credit [Member]
Commitments	1,967	2,477
Federal Home Loan Bank of San Francisco Affordable Housing Grant Sponsorships [Member]
Commitments	3,344	3,356
Commitments	$ 222,128	$ 230,590