Note 20 - Assets and Liabilities Measured and Reported at Fair Value - Assets Measured at Fair Value on a Non-recurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Impaired loans	$ 925	$ 2,569
OREO	1,018	2,640
Assets, Fair Value Disclosure	1,943	5,209
Fair Value, Inputs, Level 1 [Member]
Impaired loans	925	2,569
OREO	1,018	2,640
Assets, Fair Value Disclosure	1,943	5,209
Fair Value, Inputs, Level 2 [Member]
Impaired loans	(514)	(121)
OREO	(32)	(171)
Total	$ (546)	$ (292)