Note 15 - Fair Values - Fair Value of Assets Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member] | Collateral Dependent Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value	$ 1,937	$ 707
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value	207	743
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value	2,144	1,450
Fair Value, Inputs, Level 1 [Member]
Assets measured at fair value
Fair Value, Inputs, Level 2 [Member] | Collateral Dependent Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value
Fair Value, Inputs, Level 2 [Member]
Assets measured at fair value	157,906	159,030
Fair Value, Inputs, Level 3 [Member] | Collateral Dependent Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value
Fair Value, Inputs, Level 3 [Member]
Assets measured at fair value
Collateral Dependent Impaired Loans [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value	1,937	707
Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value	207	743
Fair Value, Measurements, Nonrecurring [Member]
Assets measured at fair value	2,144	1,450
Assets measured at fair value	$ 157,906	$ 159,030