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Note 5 - Derivative Instruments (Details) - Offsetting of Derivative Instruments (USD $)
In Thousands, unless otherwise specified
Nov. 30, 2014
Aug. 31, 2014
Offsetting of Derivative Instruments [Abstract]    
Fair value of assets $ 1,213us-gaap_DerivativeFairValueOfDerivativeAsset $ 1,406us-gaap_DerivativeFairValueOfDerivativeAsset
Fair value of assets 0us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral 0us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral
Fair value of assets 1,213us-gaap_DerivativeAssets [1] 1,406us-gaap_DerivativeAssets [1]
Fair value of liabilities (713)us-gaap_DerivativeFairValueOfDerivativeLiability (626)us-gaap_DerivativeFairValueOfDerivativeLiability
Fair value of liabilities 136us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral 35us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral
Fair value of liabilities (577)us-gaap_DerivativeLiabilities [1] (591)us-gaap_DerivativeLiabilities [1]
Total 500us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral 780us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
Total 136us-gaap_DerivativeFairValueAmountOffsetAgainstCollateralNet 35us-gaap_DerivativeFairValueAmountOffsetAgainstCollateralNet
Total $ 636us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet $ 815us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
[1] The Company utilizes the income approach to measure fair value for its derivative instruments (foreign exchange forward contracts). The income approach uses pricing models that rely on market observable inputs such as spot, forward and interest rates, as well as credit default swap spreads and therefore are classified as Level 2.