Note 15 - Fair Values - Losses Resulting from Nonrecurring Fair Value Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Collateral Dependent Impaired Loans [Member]
Losses resulting from nonrecurring fair value adjustments	$ 1,359	$ 492	$ 1,523	$ 544
Other Real Estate Owned [Member]
Losses resulting from nonrecurring fair value adjustments	48	108	71	108
Losses resulting from nonrecurring fair value adjustments	$ 1,407	$ 600	$ 1,594	$ 652