Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Non-recurring Basis - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Impaired Loans [Member]
Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Non-recurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	$ 12,540	$ 12,923
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]
Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Non-recurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	0	0
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Non-recurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	12,540	12,923
Foreclosed Assets Held-for-sale [Member]
Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Non-recurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	0	0
Foreclosed Assets Held-for-sale [Member] | Fair Value, Inputs, Level 1 [Member]
Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Non-recurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	0	0
Foreclosed Assets Held-for-sale [Member] | Fair Value, Inputs, Level 3 [Member]
Note 8 - Disclosures about Fair Value of Assets and Liabilities (Details) - Fair Value of Assets Measured on Non-recurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	$ 0	$ 0