Note 20 - Assets and Liabilities Measured and Reported at Fair Value - Significant Unobservable Inputs (Details) - Appraisal Discount Method [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Impaired Loans [Member]
Assets, Fair Value Disclosure	$ 1,400	$ 2,100
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 1,393
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	12.90%
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 4,488
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	19.00%