Reconciliation of Changes in Accrued Product Warranty (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Accounting Policies [Abstract]
Accounts Receivable, allowance for doubtful accounts	$ 4,200	$ 5,000
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Beginning balance	892	1,145
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued	1,580	677
Warranty payments and costs incurred	(1,171)	(934)
Standard and Extended Product Warranty Accrual, Decrease for Business Divestitures	0	(27)
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss)	(1)	31
Ending balance	$ 1,300	$ 892