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Inventories - Inventory Valuation (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2021 | Aug. 31, 2020 | Aug. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of period | $ 24,221 |  |
Balance at end of period | 19,876 | $ 24,221 |
Inventory Valuation Reserve |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of period | 24,221 | 9,512 | $ 5,614
Charge to cost of revenue | 746 | 17,966 | 9,734
Disposition of inventory | (5,000) | (3,555) | (5,651)
Currency translation effect | (91) | 298 | (185)
Balance at end of period | $ 19,876 | $ 24,221 | $ 9,512

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