Note 16 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value Using Significant Unobservable Inputs (Level 3) (Details) - Fair Value, Inputs, Level 3 [Member] $ in Thousands	Jun. 30, 2019 USD ($)
Impaired loans	$ 355
OREO	1,258
Assets held-for-sale	$ 198
Minimum [Member] | Measurement Input, Comparability Adjustment [Member]
Impaired loans, appraisal comparability adjustment	0.09
OREO, appraisal comparability adjustment	0.09
Assets held-for-sale	0.09
Maximum [Member] | Measurement Input, Comparability Adjustment [Member]
Impaired loans, appraisal comparability adjustment	0.1
OREO, appraisal comparability adjustment	0.1
Assets held-for-sale	0.1
Weighted Average [Member] | Measurement Input, Comparability Adjustment [Member]
Impaired loans, appraisal comparability adjustment	(0.095)
OREO, appraisal comparability adjustment	(0.095)
Assets held-for-sale	(0.095)