Note 22 - Qualified Affordable Housing Partnership Investments - Generated Tax Credits and Benefits From Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Generated tax credits	$ 478	$ 616	$ 655
Tax benefits from taxable losses	105	165	197
Raymond James California Housing Opportunities Fund II [Member]
Generated tax credits	170	176	184
Tax benefits from taxable losses	30	51	54
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Generated tax credits	111	114	107
Tax benefits from taxable losses	15	17	36
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Generated tax credits	192	200	206
Tax benefits from taxable losses	34	52	60
California Affordable Housing Fund [Member]
Generated tax credits	5	126	158
Tax benefits from taxable losses	$ 26	$ 45	$ 47