Supplemental Balance Sheet Information - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021
Intangible Assets [Line Items]
Definite-lived intangible assets, Accumulated Amortization	$ (17,751)	$ (16,824)
Definite-lived intangible assets, Net	34,658
Intangible assets, Gross Carrying Amount	52,989	53,878
Intangible assets, Net	$ 35,238	$ 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	$ 12,959	$ 13,216
Definite-lived intangible assets, Accumulated Amortization	(9,046)	(8,878)
Definite-lived intangible assets, Net	$ 3,913	$ 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	$ 35,899	$ 36,531
Definite-lived intangible assets, Accumulated Amortization	(6,370)	(5,652)
Definite-lived intangible assets, Net	$ 29,529	$ 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	(2,335)	(2,294)
Definite-lived intangible assets, Net	1,216	1,257
Definite-Lived Intangible Assets [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	52,409	53,298
Definite-lived intangible assets, Accumulated Amortization	(17,751)	(16,824)
Definite-lived intangible assets, Net	34,658	36,474
Trademarks and Trade Names [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net	$ 580	$ 580