Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	$ 174,251	$ 159,030
Fair Value, Measurements, Nonrecurring [Member]
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	1,304	1,450
Fair Value, Measurements, Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member]
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	941	707
Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned [Member]
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	363	743
Fair Value, Inputs, Level 2 [Member]
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	174,251	159,030
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	1,304	1,450
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member]
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	941	707
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned [Member]
Note 15 - Fair Values (Details) - Fair Value of Assets Measured on a Non-Recurring Basis [Line Items]
Assets measured at fair value	$ 363	$ 743