Note 20 - Qualified Affordable Housing Partnership Investments - Generated Tax Credits and Benefits From Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Generated tax credits	$ 455	$ 478
Tax benefits from taxable losses	101	105
Raymond James California Housing Opportunities Fund II [Member]
Generated tax credits	170	170
Tax benefits from taxable losses	29	30
WNC Institutional Tax Credit Fun 38 L.P. [Member]
Generated tax credits	93	111
Tax benefits from taxable losses	15	15
Merritt Community Capital Corporation Fund XV, L.P. [Member]
Generated tax credits	192	192
Tax benefits from taxable losses	32	34
California Affordable Housing Fund [Member]
Generated tax credits		5
Tax benefits from taxable losses	$ 25	$ 26