Note 15 - Fair Values (Details) - Fair Value of Financial Instruments - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financial assets :
Securities available-for-sale	$ 160,763	$ 186,986
Securities held-to-maturity	36,430
Financial liabilities:
Federal Home Loan Bank of San Francisco advances	90,000	75,000
Reported Value Measurement [Member]
Financial assets :
Cash and cash equivalents	32,796	58,422
Securities available-for-sale	160,763	186,986
Securities held-to-maturity	36,655	36,806
Net loans	688,775	650,235
Federal Home Loan Bank of San Francisco stock	4,465	5,728
Financial liabilities:
Deposits	760,039	789,035
Federal Home Loan Bank of San Francisco advances	90,000	75,000
Subordinated debenture	10,310	10,310
Derivatives	3,090	3,224
Estimate of Fair Value Measurement [Member]
Financial assets :
Cash and cash equivalents	32,796	58,422
Securities available-for-sale	160,763	186,986
Securities held-to-maturity	36,430	37,118
Net loans	698,993	661,126
Federal Home Loan Bank of San Francisco stock	4,465	5,728
Financial liabilities:
Deposits	761,349	790,068
Federal Home Loan Bank of San Francisco advances	90,000	75,000
Subordinated debenture	5,111	4,932
Derivatives	3,090	3,224
Fair Value, Inputs, Level 1 [Member]
Financial assets :
Cash and cash equivalents	32,796	58,422
Securities available-for-sale		2,571
Federal Home Loan Bank of San Francisco stock	4,465	5,728
Fair Value, Inputs, Level 2 [Member]
Financial assets :
Securities available-for-sale	160,763	184,415
Securities held-to-maturity	36,430	37,118
Financial liabilities:
Deposits	761,349	790,068
Federal Home Loan Bank of San Francisco advances	90,000	75,000
Subordinated debenture	5,111	4,932
Derivatives	3,090	3,224
Fair Value, Inputs, Level 3 [Member]
Financial assets :
Net loans	$ 698,993	$ 661,126