Summary of Significant Accounting Policies and Select Balance Sheet Information - Other Assets Consist Principally of Strategic Investments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Schedule of Investments [Line Items]
Other assets, net	$ 3,166	$ 4,075
OctoPlus N.V. [Member]
Schedule of Investments [Line Items]
Other assets, net		718
Nexeon MedSystems, Inc. [Member]
Schedule of Investments [Line Items]
Other assets, net		29
CeloNova BioSciences, Inc [Member]
Schedule of Investments [Line Items]
Other assets, net	1,500	1,500
ThermopeutiX, Inc [Member]
Schedule of Investments [Line Items]
Other assets, net	1,185	1,185
ViaCyte, Inc. [Member]
Schedule of Investments [Line Items]
Other assets, net	479	559
Other [Member]
Schedule of Investments [Line Items]
Other assets, net	$ 2	$ 84