Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Impaired Loans [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Fair value (in Dollars)	$ 93	$ 6,628
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Fair value (in Dollars)	93	6,628
Fair Value, Inputs, Level 3 [Member] | Income Approach Valuation Technique [Member] | Impaired Loans [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Fair value (in Dollars)	$ 93	$ 6,628
Valuation Technique	Discounted appraisals	Discounted appraisals
Unobservable Inputs	Marketability discount	Marketability discount
Fair Value, Inputs, Level 3 [Member] | OREO [Member] | Income Approach Valuation Technique [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Fair value (in Dollars)	$ 2,879	$ 5,526
Valuation Technique	Discounted appraisals	Discounted appraisals
Unobservable Inputs	Marketability discount	Marketability discount
Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Income Approach Valuation Technique [Member] | Impaired Loans [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Marketability discount	0.00%	0.00%
Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | OREO [Member] | Income Approach Valuation Technique [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Marketability discount	2.70%	2.30%
Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Income Approach Valuation Technique [Member] | Impaired Loans [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Marketability discount	0.00%	8.30%
Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | OREO [Member] | Income Approach Valuation Technique [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Marketability discount	45.40%	26.90%
Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | Income Approach Valuation Technique [Member] | Impaired Loans [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Marketability discount	0.00%	7.90%
Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member] | OREO [Member] | Income Approach Valuation Technique [Member]
Note 12 - Fair Value Measurements (Details) - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements [Line Items]
Marketability discount	22.10%	6.50%