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Note 8 - Derivative Financial Instruments (Details Textual) (USD $)
1 Months Ended
May 30, 2010
Mar. 01, 2015
May 25, 2014
Derivative [Line Items]      
Interest Rate Swap Term 5 years    
Derivative, Notional Amount $ 20,000,000invest_DerivativeNotionalAmount    
Derivative, Swaption Interest Rate 4.24%us-gaap_DerivativeSwaptionInterestRate    
Derivative Asset, Notional Amount 20,000,000us-gaap_DerivativeAssetNotionalAmount    
Derivative Liability, Fair Value, Gross Liability   $ 2,000us-gaap_DerivativeFairValueOfDerivativeLiability $ 44,000us-gaap_DerivativeFairValueOfDerivativeLiability