Supplemental Balance Sheet Information - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2023	Sep. 30, 2022
Intangible Assets [Line Items]
Definite-lived intangible assets, Accumulated Amortization	$ (23,544)	$ (19,283)
Definite-lived intangible assets, Net	27,218
Intangible assets, Gross Carrying Amount	51,342	47,428
Intangible assets, Net	$ 27,798	$ 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	$ 12,484	$ 11,354
Definite-lived intangible assets, Accumulated Amortization	(10,386)	(8,827)
Definite-lived intangible assets, Net	$ 2,098	$ 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	$ 34,727	$ 31,943
Definite-lived intangible assets, Accumulated Amortization	(10,570)	(7,994)
Definite-lived intangible assets, Net	$ 24,157	$ 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	(2,588)	(2,462)
Definite-lived intangible assets, Net	963	1,089
Definite-Lived Intangible Assets [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	50,762	46,848
Definite-lived intangible assets, Accumulated Amortization	(23,544)	(19,283)
Definite-lived intangible assets, Net	27,218	27,565
Trademarks and Trade Names [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net	$ 580	$ 580