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Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Detail) - Accounts Receivable [Member] - Credit Concentration Risk [Member]
3 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Customer A [Member]    
Revenue, Major Customer [Line Items]    
Concentration Risk, Percentage 20.00% 13.00%
Customer B [Member]    
Revenue, Major Customer [Line Items]    
Concentration Risk, Percentage 17.00% 13.00%
Customer C [Member]    
Revenue, Major Customer [Line Items]    
Concentration Risk, Percentage 16.00% 13.00%
Customer D [Member]    
Revenue, Major Customer [Line Items]    
Concentration Risk, Percentage 14.00% 20.00%