Note 15 - Fair Values (Details) - Fair Value of Financial Instruments - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financial assets:
Securities available-for-sale	$ 157,309	$ 186,986
Securities held-to-maturity	36,294
Financial liabilities:
Federal Home Loan Bank of San Francisco advances	75,000	75,000
Reported Value Measurement [Member]
Financial assets:
Cash and cash equivalents	25,309	58,422
Securities available-for-sale	157,309	186,986
Securities held-to-maturity	36,093	36,806
Net loans	708,360	650,235
Federal Home Loan Bank of San Francisco stock	4,465	5,728
Financial liabilities:
Deposits	779,505	789,035
Federal Home Loan Bank of San Francisco advances	75,000	75,000
Subordinated debenture	10,310	10,310
Derivatives	3,136	3,224
Estimate of Fair Value Measurement [Member]
Financial assets:
Cash and cash equivalents	25,309	58,422
Securities available-for-sale	157,309	186,986
Securities held-to-maturity	36,294	37,118
Net loans	714,764	661,126
Federal Home Loan Bank of San Francisco stock	4,465	5,728
Financial liabilities:
Deposits	781,643	790,068
Federal Home Loan Bank of San Francisco advances	75,000	75,000
Subordinated debenture	5,177	4,932
Derivatives	3,136	3,224
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents	25,309	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	157,309	184,415
Securities held-to-maturity	36,294	37,118
Financial liabilities:
Deposits	781,643	790,068
Federal Home Loan Bank of San Francisco advances	75,000	75,000
Subordinated debenture	5,177	4,932
Derivatives	3,136	3,224
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Net loans	$ 714,764	$ 661,126