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Note 4 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts (Foreign Exchange Contract [Member]) In Thousands, unless otherwise specified | Dec. 31, 2014 United Kingdom, Pounds GBP (£) | Dec. 31, 2013 United Kingdom, Pounds GBP (£) | Dec. 31, 2013 United States of America, Dollars USD ($)
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Note 4 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts [Line Items] |  |  |
British Pound Sterling (GBP) to Euro | £ 5,000 invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_GBP / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | £ 4,000 invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_GBP / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | $ 650 invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_USD / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember
United States Dollar (USD) to Euro (in Dollars) | £ 5,000 invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_GBP / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | £ 4,000 invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_GBP / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | $ 650 invest_DerivativeNotionalAmount / us-gaap_CurrencyAxis = currency_USD / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember

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- Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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