Note 8 - Deposits - Interest Expense on Time Deposits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest bearing demand	$ 1,740	$ 1,406	$ 1,229
Money market accounts	13,308	10,138	8,627
Saving accounts	1,046	901	802
Time deposits	43,327	39,443	35,111
Total	$ 59,421	$ 51,888	$ 45,769