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Fair Value Measurements - Schedule of Contingent Consideration Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |  |  |
Interest accretion | $ 3 | $ 3 | $ 6 | $ 6
Contingent Consideration [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |  |
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] |  |  |  |
Contingent consideration liability, beginning balance |  |  | 829 |
Interest accretion |  |  | 6 |
Contingent consideration liability, ending balance | $ 835 |  | $ 835 |

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