Note 14 - Fair Values - Losses Resulting from Non-recurring Fair Value Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Collateral Dependent Impaired Loans [Member]
Losses resulting from nonrecurring fair value adjustments	$ 15	$ 199	$ 1,068	$ 744
Other Real Estate Owned [Member]
Losses resulting from nonrecurring fair value adjustments			71	108
Losses resulting from nonrecurring fair value adjustments	$ 15	$ 199	$ 1,139	$ 852