Summary of Significant Accounting Policies - Summary of Acquired Intangible Assets Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 28,777	$ 28,742
Accumulated Amortization	20,720	18,478
Manufacturing Technologies, Core Products and Cell Lines [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	11,676	11,678
Accumulated Amortization	10,097	9,327
Trademarks, Licenses and Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,748	4,704
Accumulated Amortization	2,130	1,616
Customer Lists and Supply Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	12,353	12,360
Accumulated Amortization	$ 8,493	$ 7,535