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Summary of Restructuring Accruals and Certain Facility Closures (Detail) - Jun. 30, 2015 - USD ($)
$ in Thousands
Total
Total
Restructuring Reserve [Roll Forward]    
Accrual at September 30, 2014   $ 262
Expense Additions   1,493
Cash Payments   (1,231)
Accrual at June 30, 2015 $ 524 524
Facilities charges    
Restructuring Reserve [Roll Forward]    
Accrual at September 30, 2014   92
Expense Additions   0
Cash Payments   (92)
Accrual at June 30, 2015 0 0
Employee separation    
Restructuring Reserve [Roll Forward]    
Accrual at September 30, 2014   170
Expense Additions 1,500 1,493
Cash Payments   (1,139)
Accrual at June 30, 2015 $ 524 $ 524