Note 11 - Fair Value of Financial Instruments and Fair Value Measurements (Details) - Quantitative Information for Financial Instruments Measured at Fair Value - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Market Approach Valuation Technique [Member] | Residential [Member]
Impaired Loans
Assets measured at fair value (in Dollars)	$ 773	$ 1,651
Market Approach Valuation Technique [Member] | Commercial [Member]
Impaired Loans
Assets measured at fair value (in Dollars)	5,714	5,678
Market Approach Valuation Technique [Member] | Farmland [Member]
Impaired Loans
Assets measured at fair value (in Dollars)	333	367
Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Impaired Loans
Assets measured at fair value (in Dollars)	62	82
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Impaired Loans
Assets measured at fair value (in Dollars)	$ 5,816	$ 6,128
Minimum [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Impaired Loans
Management adjustment for age of appraisals and/or current market conditions	0.00%	0.00%
Minimum [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Impaired Loans
Adjustment for differences between the comparable sales	(15.00%)	(2.30%)
Management adjustment for age of appraisals and/or current market conditions	10.00%	0.00%
Minimum [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Impaired Loans
Adjustment for differences between the comparable sales	0.00%	0.00%
Management adjustment for age of appraisals and/or current market conditions	0.00%	0.00%
Minimum [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Impaired Loans
Adjustment for differences between the comparable sales	(8.30%)	(8.30%)
Management adjustment for age of appraisals and/or current market conditions	10.00%	10.00%
Minimum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Impaired Loans
Adjustment for differences between the comparable sales	(22.00%)	(22.00%)
Minimum [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Impaired Loans
Adjustment for differences between the comparable sales	(56.00%)	(40.00%)
Management adjustment for age of appraisals and/or current market conditions	0.33%	0.33%
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Impaired Loans
Management adjustment for age of appraisals and/or current market conditions	5.00%	5.00%
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Impaired Loans
Adjustment for differences between the comparable sales	88.35%	94.70%
Management adjustment for age of appraisals and/or current market conditions	17.50%	5.00%
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Impaired Loans
Adjustment for differences between the comparable sales	0.00%	0.00%
Management adjustment for age of appraisals and/or current market conditions	15.00%	45.00%
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Impaired Loans
Adjustment for differences between the comparable sales	122.10%	122.10%
Management adjustment for age of appraisals and/or current market conditions	42.50%	30.00%
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Residential [Member]
Impaired Loans
Capitalization rate	12.50%	13.75%
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Commercial [Member]
Impaired Loans
Capitalization rate	11.00%	11.00%
Weighted Average [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Impaired Loans
Adjustment for differences between the comparable sales	(0.95%)	8.05%
Weighted Average [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Impaired Loans
Adjustment for differences between the comparable sales	91.00%	2.50%
Management adjustment for age of appraisals and/or current market conditions	30.36%	31.88%
Weighted Average [Member] | Other Real Estate Owned [Member] | Income Approach Valuation Technique [Member]
Impaired Loans
Capitalization rate	10.62%	10.00%
Discount rate	12.00%	9.00%
Maximum [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Impaired Loans
Management adjustment for age of appraisals and/or current market conditions	10.00%	10.00%
Maximum [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Impaired Loans
Adjustment for differences between the comparable sales	191.70%	191.70%
Management adjustment for age of appraisals and/or current market conditions	25.00%	10.00%
Maximum [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Impaired Loans
Adjustment for differences between the comparable sales	0.00%	0.00%
Management adjustment for age of appraisals and/or current market conditions	30.00%	90.00%
Maximum [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Impaired Loans
Adjustment for differences between the comparable sales	252.50%	252.50%
Management adjustment for age of appraisals and/or current market conditions	75.00%	50.00%
Maximum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Impaired Loans
Adjustment for differences between the comparable sales	20.10%	38.10%
Maximum [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Impaired Loans
Adjustment for differences between the comparable sales	238.00%	45.00%
Management adjustment for age of appraisals and/or current market conditions	69.36%	69.36%