Note 5 - Other Real Estate Owned - Changes in Other Real Estate Owned ("OREO") (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Balance at beginning of year	$ 4,932	$ 6,326	$ 2,985
Acquisitions	639	1,667	7,112
Reductions to carrying value	(1,763)	(896)	(5)
Sales	(3,275)	(2,165)	(3,766)
Balance at end of year	$ 533	$ 4,932	$ 6,326