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Rollforward of Accrued Product Warranty Reserve (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 1,300 $ 892
Provision for warranties 395 464
Warranty Payments and costs incurred (230) (399)
Impact of changes in foreign currency rates (31) 2
Ending balance $ 1,434 $ 959