Note 14 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Credits and Adjustments	$ 158,000	$ 160,000	$ 159,000
Increase (Decrease) in Income Taxes	(76,000)	(80,000)	$ (83,000)
Unrecognized Tax Benefits	0
Other Assets [Member]
Amortization Method Qualified Affordable Housing Project Investments	$ 713,000	$ 812,000