Note 9 - Qualified Affordable Housing Partnership Investments - Generated Tax Credits and Benefits from Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Raymond James California Housing Opportunities Fund II [Member]
Generated tax credits	$ 45	$ 43	$ 89	$ 87
Tax benefits from taxable losses	12	13	25	26
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Generated tax credits	28	25	56	50
Tax benefits from taxable losses	7	7	14	14
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Generated tax credits	55	54	109	109
Tax benefits from taxable losses	14	15	29	30
California Affordable Housing Fund [Member]
Generated tax credits	40	40	79	79
Tax benefits from taxable losses	12	12	24	25
Generated tax credits	168	162	333	325
Tax benefits from taxable losses	$ 45	$ 47	$ 92	$ 95