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Acquisition - Summary of Estimated Fair Values Allocated to Major Classes of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Sep. 30, 2014
Business Acquisition [Line Items]    
Goodwill $ 7,247 $ 7,247
Ascolta [Member] | Assets Acquired [Member]    
Business Acquisition [Line Items]    
Accounts receivable and other current assets 849  
Furniture and equipment 370  
Identifiable intangible assets 1,670  
Goodwill 3,332  
Ascolta [Member] | Liabilities Assumed [Member]    
Business Acquisition [Line Items]    
Other liabilities $ 1,001