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Income Taxes - Schedule of Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Current provision (benefit): |  |  |
U.S. Federal | $ 263 | $ (1,570) | $ 1,355
U.S. State | 108 | 42 | 192
International | 87 | 90 | 41
Total current provision (benefit) | 458 | (1,438) | 1,588
Deferred provision (benefit): |  |  |
U.S. Federal | 1,851 | (1,336) | (1,505)
U.S. State | (62) | 197 | (117)
International | (138) |  |
Total deferred benefit | 1,651 | (1,139) | (1,622)
Total income tax provision (benefit) | $ 2,109 | $ (2,577) | $ (34)

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