Note 6 - Other Real Estate Owned - OREO Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Beginning balance	$ 10,673	$ 21,843
Transfers from loans and other increases	821	2,044
Proceeds from sales	(5,419)	(11,289)
Gain (loss) on sales, net	208	(473)
Write downs and other decreases, net	(794)	(1,452)
Ending balance	$ 5,489	$ 10,673