Note 8 - Other Real Estate Owned - Changes in OREO (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Balance at beginning of year	$ 35	$ 759	$ 1,423
Additions	140	1,071	189
Dispositions	(144)	(1,743)	(745)
Valuation adjustments		(52)	(108)
Balance at ending of year	$ 31	$ 35	$ 759