Note 2 - Fair Value of Financial Instruments (Details) - Level 3 Fair Value Measurements - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)	$ 936	$ 1,679
Valuation technique	Sales approach	Sales approach
Fair value (in Dollars)	$ 936	$ 1,679
Valuation technique	Sales approach	Sales approach
Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 2,673
Valuation technique		Sales approach
Fair value (in Dollars)		$ 2,673
Valuation technique		Sales approach
Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Construction Loans [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)	$ 1,147	$ 1,147
Valuation technique	Sales approach	Sales approach
Fair value (in Dollars)	$ 1,147	$ 1,147
Valuation technique	Sales approach	Sales approach
Commercial Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique		Income approach
Valuation technique		Income approach
Capitalization rate		10.00%
Commercial Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)	$ 2,672	$ 2,597
Valuation technique	Sales approach	Income approach
Fair value (in Dollars)	$ 2,672	$ 2,597
Valuation technique	Sales approach	Income approach
Capitalization rate		6.50%
Commercial Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value (in Dollars)		$ 2,532
Valuation technique		Sales approach
Fair value (in Dollars)		$ 2,532
Valuation technique		Sales approach
Minimum [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables	9.00%	0.30%
Minimum [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables		0.00%
Minimum [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Construction Loans [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables	5.00%	5.00%
Minimum [Member] | Commercial Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rate	0.00%
Minimum [Member] | Commercial Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables		10.00%
Maximum [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables	62.00%	62.00%
Maximum [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables		12.50%
Maximum [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Construction Loans [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables	35.00%	35.00%
Maximum [Member] | Commercial Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rate	12.50%
Maximum [Member] | Commercial Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables		30.00%
Weighted Average [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables	28.00%	18.00%
Weighted Average [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables		5.70%
Weighted Average [Member] | Commercial Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Construction Loans [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables	18.00%	18.00%
Weighted Average [Member] | Commercial Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rate		10.00%
Weighted Average [Member] | Commercial Real Estate Portfolio Segment [Member] | Income Approach Valuation Technique [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rate	5.70%	6.50%
Weighted Average [Member] | Commercial Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment to comparables		21.42%