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	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Market Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	$ 774	$ 1,651
Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	6,039	5,678
Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	333	367
Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	64	82
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets measured at fair value (in Dollars)	$ 4,974	$ 6,128
Minimum [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	0.00%	0.00%
Minimum [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	0.00%	0.00%
Adjustment for differences between the comparable sales	(15.00%)	(2.30%)
Minimum [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	0.00%	0.00%
Adjustment for differences between the comparable sales	(10.75%)	0.00%
Minimum [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	10.00%	10.00%
Adjustment for differences between the comparable sales	(8.30%)	(8.30%)
Minimum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment for differences between the comparable sales	(15.60%)	(22.00%)
Minimum [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	0.33%	0.33%
Adjustment for differences between the comparable sales	(78.93%)	(40.00%)
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
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]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	12.50%	5.00%
Adjustment for differences between the comparable sales	88.35%	94.70%
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	15.00%	45.00%
Adjustment for differences between the comparable sales	4.37%	0.00%
Weighted Average [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	42.50%	30.00%
Adjustment for differences between the comparable sales	122.10%	122.10%
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rate	12.50%	13.75%
Weighted Average [Member] | Income Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Capitalization rate	11.00%	11.00%
Weighted Average [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment for differences between the comparable sales	2.25%	8.05%
Weighted Average [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	26.27%	31.88%
Adjustment for differences between the comparable sales	(18.02%)	2.50%
Weighted Average [Member] | Other Real Estate Owned [Member] | Income Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	13.75%	9.00%
Capitalization rate	11.88%	10.00%
Maximum [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	10.00%	10.00%
Maximum [Member] | Market Approach Valuation Technique [Member] | Residential [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	25.00%	10.00%
Adjustment for differences between the comparable sales	191.70%	191.70%
Maximum [Member] | Market Approach Valuation Technique [Member] | Commercial [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	30.00%	90.00%
Adjustment for differences between the comparable sales	19.48%	0.00%
Maximum [Member] | Market Approach Valuation Technique [Member] | Farmland [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	75.00%	50.00%
Adjustment for differences between the comparable sales	252.50%	252.50%
Maximum [Member] | Real Estate Portfolio Segment [Member] | Market Approach Valuation Technique [Member] | Commercial Constuction [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Adjustment for differences between the comparable sales	20.10%	38.10%
Maximum [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Management adjustment for age of appraisals and/or current market conditions	69.36%	69.36%
Adjustment for differences between the comparable sales	42.90%	45.00%