Goodwill and Other Intangible Assets, Net - Summary of Acquired Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 135,701	$ 135,956
Accumulated Amortization	56,643	51,805
Manufacturing Technologies, Core Products and Cell Lines [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	62,385	62,416
Accumulated Amortization	24,510	22,633
Tradenames, Licenses and Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	18,451	18,489
Accumulated Amortization	10,070	9,492
Customer Lists, Customer Relationships, and Supply Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	54,755	54,941
Accumulated Amortization	22,021	19,649
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	110	110
Accumulated Amortization	$ 42	$ 31