Note 10 - Intangible Assets - Mortgage Servicing Activity (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Balance, beginning of period	$ 1,499	$ 1,507	$ 1,507
Originations	475	366	547
Amortization	(437)	(427)	(555)
Balance, end of period	1,537	1,446	1,499
Fair value of mortgage servicing rights	$ 2,426	$ 2,579	$ 2,590