Intangible Assets - Summary of Acquired Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 29,908	$ 30,097
Accumulated Amortization	24,443	24,166
Manufacturing Technologies, Core Products and Cell Lines [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	11,547	11,582
Accumulated Amortization	10,963	10,906
Trademarks, Licenses and Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,349	6,410
Accumulated Amortization	3,450	3,296
Customer Lists and Supply Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	12,012	12,105
Accumulated Amortization	$ 10,030	$ 9,964