Note 8 - Qualified Affordable Housing Partnership Investments - Generated Tax Credits and Benefits from Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Generated tax credits	$ 158	$ 167
Tax benefits from taxable losses	45	45
Raymond James California Housing Opportunities Fund II [Member]
Generated tax credits	44	44
Tax benefits from taxable losses	12	12
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Generated tax credits	28	28
Tax benefits from taxable losses	7	7
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Generated tax credits	54	55
Tax benefits from taxable losses	14	14
California Affordable Housing Fund [Member]
Generated tax credits	32	40
Tax benefits from taxable losses	$ 12	$ 12