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Supplemental Balance Sheet Information - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Sep. 30, 2022
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Accumulated Amortization | $ (22,589) | $ (19,283)
Definite-lived intangible assets, Net | 28,146 |
Intangible assets, Gross Carrying Amount | 51,315 | 47,428
Intangible assets, Net | $ 28,726 | $ 28,145
Customer Lists and Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Weighted Average Original Life (Years) | 8 years 10 months 24 days | 8 years 10 months 24 days
Definite-lived intangible assets, Gross Carrying Amount | $ 12,476 | $ 11,354
Definite-lived intangible assets, Accumulated Amortization | (10,160) | (8,827)
Definite-lived intangible assets, Net | $ 2,316 | $ 2,527
Developed Technology [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Weighted Average Original Life (Years) | 11 years 10 months 24 days | 11 years 10 months 24 days
Definite-lived intangible assets, Gross Carrying Amount | $ 34,708 | $ 31,943
Definite-lived intangible assets, Accumulated Amortization | (9,883) | (7,994)
Definite-lived intangible assets, Net | $ 24,825 | $ 23,949
Patents and Other [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Weighted Average Original Life (Years) | 14 years 1 month 6 days | 14 years 1 month 6 days
Definite-lived intangible assets, Gross Carrying Amount | $ 3,551 | $ 3,551
Definite-lived intangible assets, Accumulated Amortization | (2,546) | (2,462)
Definite-lived intangible assets, Net | 1,005 | 1,089
Definite-Lived Intangible Assets [Member] |  |
Intangible Assets [Line Items] |  |
Definite-lived intangible assets, Gross Carrying Amount | 50,735 | 46,848
Definite-lived intangible assets, Accumulated Amortization | (22,589) | (19,283)
Definite-lived intangible assets, Net | 28,146 | 27,565
Trademarks and Trade Names [Member] |  |
Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets, Net | $ 580 | $ 580

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