Note 9 - Qualified Affordable Housing Project Investments (Details) - Generated Tax Credits and Tax Benefits - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Note 9 - Qualified Affordable Housing Project Investments (Details) - Generated Tax Credits and Tax Benefits [Line Items]
Generated tax credits	$ 164	$ 155	$ 493	$ 467
Tax benefits from taxable losses	48	46	144	139
Raymond James California Housing Opportunities Fund II [Member]
Note 9 - Qualified Affordable Housing Project Investments (Details) - Generated Tax Credits and Tax Benefits [Line Items]
Generated tax credits	43	29	131	86
Tax benefits from taxable losses	13	10	39	30
WNC Institutional Tax Credit Fun 38, L.P. [Member]
Note 9 - Qualified Affordable Housing Project Investments (Details) - Generated Tax Credits and Tax Benefits [Line Items]
Generated tax credits	27	21	81	63
Tax benefits from taxable losses	8	5	23	15
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Note 9 - Qualified Affordable Housing Project Investments (Details) - Generated Tax Credits and Tax Benefits [Line Items]
Generated tax credits	54	66	163	199
Tax benefits from taxable losses	15	19	45	56
California Affordable Housing Fund [Member]
Note 9 - Qualified Affordable Housing Project Investments (Details) - Generated Tax Credits and Tax Benefits [Line Items]
Generated tax credits	40	39	118	119
Tax benefits from taxable losses	$ 12	$ 12	$ 37	$ 38