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Note 2 - Fair Value Measurements (Details) - Assets and Liabilities Measured at Fair Value (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Financial liabilities:    
Financial liabilities $ (446)us-gaap_FinancialLiabilitiesFairValueDisclosure $ (326)us-gaap_FinancialLiabilitiesFairValueDisclosure
Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member]    
Financial liabilities:    
Financial liabilities (446)us-gaap_FinancialLiabilitiesFairValueDisclosure
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ForwardContractsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 (326)us-gaap_FinancialLiabilitiesFairValueDisclosure
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ForwardContractsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
Forward Contracts [Member]    
Financial liabilities:    
Financial liabilities (446)us-gaap_FinancialLiabilitiesFairValueDisclosure
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ForwardContractsMember		 (326)us-gaap_FinancialLiabilitiesFairValueDisclosure
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ForwardContractsMember
Fair Value, Inputs, Level 2 [Member]    
Financial liabilities:    
Financial liabilities $ (446)us-gaap_FinancialLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member		 $ (326)us-gaap_FinancialLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member