Note 11 - Assets and Liabilities Carried at Fair Value on a Non-recurring Basis, and the Method Used to Determine Their Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]
Assets
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member]
Assets
Fair Value, Inputs, Level 1 [Member]
Assets
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]
Assets
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member]
Assets
Fair Value, Inputs, Level 2 [Member]
Assets
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Assets	13,381	15,360
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member]
Assets	3,668	4,932
Fair Value, Inputs, Level 3 [Member]
Assets	17,049	20,292
Impaired Loans [Member]
Assets	13,381	15,360
Other Real Estate Owned [Member]
Assets	3,668	4,932
Assets	$ 17,049	$ 20,292