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Note 2 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts (Foreign Exchange Contract [Member], USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
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United States of America, Dollars |  |
Note 2 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts [Line Items] |  |
Foreign currency contracts, notional amount | $ 250 | $ 650
United Kingdom, Pounds |  |
Note 2 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts [Line Items] |  |
Foreign currency contracts, notional amount | $ 3,000 | $ 4,000

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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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