Note 17 - Assets and Liabilities Measured and Reported at Fair Value - Significant Unobservable Inputs (Details) - Appraisal Discount Method [Member] - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	10.10%
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 1,099,000
Impaired Loans [Member]
Assets, Fair Value Disclosure	$ 1,100,000	$ 2,100,000
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member]
Weighted average of input	19.30%
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure	$ 4,353,000