Note 23 - Fair Value of Financial Instruments - Assets Measured at Fair Value on Non-recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Inputs, Level 3 [Member]
Impaired loans	$ 665
OREO	1,505
Assets held-for-sale	198
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	665	$ 694
OREO	1,505	3,792
Assets held-for-sale	198	228
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans
OREO
Assets held-for-sale
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans
OREO
Assets held-for-sale
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	665	694
OREO	1,505	3,792
Assets held-for-sale	$ 198	$ 228