Note 12 - Commitments and Contingencies (Details) - Summary of the Bank’s Commitments and Contingent Liabilities - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Note 12 - Commitments and Contingencies (Details) - Summary of the Bank’s Commitments and Contingent Liabilities [Line Items]
Commitments	$ 203,047	$ 230,590
Commitments to Extend Credit [Member]
Note 12 - Commitments and Contingencies (Details) - Summary of the Bank’s Commitments and Contingent Liabilities [Line Items]
Commitments	197,605	224,757
Standby Letters of Credit [Member]
Note 12 - Commitments and Contingencies (Details) - Summary of the Bank’s Commitments and Contingent Liabilities [Line Items]
Commitments	2,098	2,477
Federal Home Loan Bank of San Francisco Affordable Housing Grant Sponsorships [Member]
Note 12 - Commitments and Contingencies (Details) - Summary of the Bank’s Commitments and Contingent Liabilities [Line Items]
Commitments	$ 3,344	$ 3,356