Note 8 - Disclosures About Fair Value of Assets and Liabilities - Fair Value of Assets Measured on Non-recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
Assets measured at fair value on a nonrecurring basis
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Assets measured at fair value on a nonrecurring basis
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Assets measured at fair value on a nonrecurring basis	3,329	5,000
Impaired Loans [Member]
Assets measured at fair value on a nonrecurring basis	3,329	5,000
Foreclosed Assets Held For Sale [Member] | Fair Value, Inputs, Level 1 [Member]
Assets measured at fair value on a nonrecurring basis
Foreclosed Assets Held For Sale [Member] | Fair Value, Inputs, Level 2 [Member]
Assets measured at fair value on a nonrecurring basis
Foreclosed Assets Held For Sale [Member] | Fair Value, Inputs, Level 3 [Member]
Assets measured at fair value on a nonrecurring basis
Foreclosed Assets Held For Sale [Member]
Assets measured at fair value on a nonrecurring basis