Note 14 - Fair Values - Losses Resulting from Non-recurring Fair Value Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Losses resulting from nonrecurring fair value adjustments	$ 122	$ 219
Collateral Dependent Impaired Loans [Member]
Losses resulting from nonrecurring fair value adjustments		164
Other Real Estate Owned [Member]
Losses resulting from nonrecurring fair value adjustments	$ 122	$ 55