Note 18 - Assets and Liabilities Measured and Reported at Fair Value - Significant Unobservable Inputs (Details) - Appraisal Discount Method [Member] - USD ($)	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	12.30%
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 2,299,000
Impaired Loans [Member]
Assets, Fair Value Disclosure	$ 2,300,000	$ 2,100,000
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	19.20%
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 4,301,000