Note 14 - Accumulated Other Comprehensive Income (Loss) - Changes for Unrealized Gains and Losses Securities Available for Sale (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Beginning Balance	$ 93,388
Ending Balance	91,602	$ 93,388
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Beginning Balance	(5,022)	(4,434)
Other Comprehensive Income Before Reclassification	1,246	(334)
Amounts Reclassified from Accumulated Other Comprehensive Income		(254)
Change in Unrealized Gains (Losses) on Securities Available for Sale, Net of Reclassification Adjustment and Tax Effects	1,246	(588)
Ending Balance	$ (3,776)	$ (5,022)