Note 6 - Other Real Estate Owned and Repossessions - Foreclosed Property Activity (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Beginning balance		$ 3,792	$ 4,858
Additions (1)	[1]	456	87
Sales proceeds		(2,656)	(848)
Gross gains		282	14
Gross losses		(127)	(121)
Net gains (losses)		155	(107)
Impairment		(242)	(198)
Ending balance		1,505	3,792
FUSB [Member]
Beginning balance		3,527	4,353
Additions (1)	[1]	399
Sales proceeds		(2,567)	(649)
Gross gains		267	14
Gross losses		(46)	(20)
Net gains (losses)		221	(6)
Impairment		(179)	(171)
Ending balance		1,401	3,527
ALC [Member]
Beginning balance		265	505
Additions (1)	[1]	57	87
Sales proceeds		(89)	(199)
Gross gains		15
Gross losses		(81)	(101)
Net gains (losses)		(66)	(101)
Impairment		(63)	(27)
Ending balance		$ 104	$ 265

[1] Additions to other real estate owned ("OREO") include transfers from loans, capitalized improvements to existing OREO properties and OREO acquired through acquisitions.