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Geographic Information (Details) (Geographic Concentration Risk [Member])
6 Months Ended
Nov. 30, 2014
Geographic Concentration Risk [Member]
 
Geographic Information (Details) [Line Items]  
Concentration Risk, Percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember