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Reconciliation of Changes in Accrued Product Warranty (Detail) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Accounting Policies [Abstract]    
Accounts Receivable, allowance for doubtful accounts $ 5,000 $ 5,100
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Beginning balance 1,145 931
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued 677 1,326
Warranty payments and costs incurred (934) (1,077)
Standard and Extended Product Warranty Accrual, Decrease for Business Divestitures (27) 0
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss) 31 (35)
Ending balance $ 892 $ 1,145