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Concentration of Customers (Details Textual) (Sales Revenue Net [Member])
9 Months Ended
Apr. 30, 2015
Sales Revenue Net [Member]
 
Product Information [Line Items]  
Concentration risk percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember