Note 18 - Assets and Liabilities Measured and Reported at Fair Value - Significant Unobservable Inputs (Details) - Appraisal Discount Method [Member] - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Impaired Loans [Member]
Assets, Fair Value Disclosure	$ 1,500,000	$ 1,400,000
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 1,754,000
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	8.80%
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 3,444,000
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	21.40%