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Note 11 - Derivatives and Fair Value Disclosures (Details) - Financial Instruments (USD $)
Dec. 31, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Non-current derivatives $ 1,873,295us-gaap_DerivativeLiabilitiesNoncurrent $ 2,955,755us-gaap_DerivativeLiabilitiesNoncurrent
Current derivatives 583,368us-gaap_DerivativeLiabilitiesCurrent 277,212us-gaap_DerivativeLiabilitiesCurrent
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]    
Derivatives, Fair Value [Line Items]    
Non-current derivatives 384,589us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
 
Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Total derivatives 384,589us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
 
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]    
Derivatives, Fair Value [Line Items]    
Non-current derivatives 1,488,706us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
2,955,755us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Current derivatives   277,212us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]    
Derivatives, Fair Value [Line Items]    
Current derivatives 583,368us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
 
Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Total derivatives $ 2,072,074us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
$ 3,232,967us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember