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Supplemental Balance Sheet Information - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Sep. 30, 2021
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Other Liabilities Disclosure [Abstract] |  |
Deferred consideration | $ 4,212 | $ 5,106
Contingent consideration | 823 | 817
Unrecognized tax benefits | 2,422 | 2,538
Operating lease liabilities | 4,303 | 3,188
Other long-term liabilities | $ 11,760 | $ 11,649

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