Note 16 - Commitments and Contingencies - Summary of the Bank's Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Commitments	$ 229,387	$ 230,590
Standby Letters of Credit [Member]
Commitments	1,967	2,477
Federal Home Loan Bank of San Francisco Affordable Housing Grant Sponsorships [Member]
Commitments	3,338	3,356
Commitments to Extend Credit [Member]
Commitments	$ 224,082	$ 224,757