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