Note 5 - Loans - Acquired Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accretable discount	$ 3	$ 62
Non- accretable discount	189	266
Accretion	(3)	(59)
Non- accretable discount, accretion	(41)	(77)
Accretable discount	0	3
Non- accretable discount	$ 148	$ 189