Supplemental Balance Sheet Information - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Intangible Assets [Line Items]
Definite-lived intangible assets, Accumulated Amortization	$ (24,110)	$ (21,901)
Definite-lived intangible assets, Net	24,204
Intangible assets, Gross Carrying Amount	48,894	48,107
Intangible assets, Net	$ 24,784	$ 26,206
Customer Lists and Relationships [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	9 years 3 months 18 days	9 years 3 months 18 days
Definite-lived intangible assets, Gross Carrying Amount	$ 11,487	$ 11,260
Definite-lived intangible assets, Accumulated Amortization	(10,060)	(9,435)
Definite-lived intangible assets, Net	$ 1,427	$ 1,825
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	$ 34,489	$ 33,929
Definite-lived intangible assets, Accumulated Amortization	(12,548)	(11,048)
Definite-lived intangible assets, Net	$ 21,941	$ 22,881
Patents and Other [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Weighted Average Original Life (Years)	14 years 10 months 24 days	14 years 10 months 24 days
Definite-lived intangible assets, Gross Carrying Amount	$ 2,338	$ 2,338
Definite-lived intangible assets, Accumulated Amortization	(1,502)	(1,418)
Definite-lived intangible assets, Net	836	920
Definite-Lived Intangible Assets [Member]
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross Carrying Amount	48,314	47,527
Definite-lived intangible assets, Accumulated Amortization	(24,110)	(21,901)
Definite-lived intangible assets, Net	24,204	25,626
Trademarks and Trade Names [Member]
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net	$ 580	$ 580