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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Net proceeds from issuance of common stock under incentive compensation and employee purchase plans | $ 1,079 | $ 1,523
Selling, General, and Administrative Expenses [Member] |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Stock-based compensation expense, approximately | $ 3,300 | $ 2,000

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