Supplemental Balance Sheet Information - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2022	Sep. 30, 2021
Intangible Assets [Line Items]
Definite-lived intangible assets, Accumulated Amortization	$ (19,024)	$ (16,824)
Definite-lived intangible assets, Net	30,172
Intangible assets, Gross Carrying Amount	49,776	53,878
Intangible assets, Net	$ 30,752	$ 37,054
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	$ 12,032	$ 13,216
Definite-lived intangible assets, Accumulated Amortization	(9,039)	(8,878)
Definite-lived intangible assets, Net	$ 2,993	$ 4,338
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	$ 33,613	$ 36,531
Definite-lived intangible assets, Accumulated Amortization	(7,565)	(5,652)
Definite-lived intangible assets, Net	$ 26,048	$ 30,879
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	(2,420)	(2,294)
Definite-lived intangible assets, Net	1,131	1,257
Definite-Lived Intangible Assets [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	49,196	53,298
Definite-lived intangible assets, Accumulated Amortization	(19,024)	(16,824)
Definite-lived intangible assets, Net	30,172	36,474
Trademarks and Trade Names [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net	$ 580	$ 580