Note 10 - Intangible Assets (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016	Mar. 11, 2016
Goodwill, Amortization period		15 years
Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life		8 years
Finite-Lived Intangible Asset, Amortization Period		15 years
Bank of America Branches [Member]
Goodwill	$ 665		$ 665
Bank of America Branches [Member] | Core Deposits [Member]
Finite-lived Intangible Assets Acquired	$ 1,800