Summary of Significant Accounting Policies and Select Balance Sheet Information (Details 5) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Schedule of other assets consist principally of strategic investments
Other assets, net	$ 2,831	$ 3,303
Investment in OctoPlus N.V. [Member]
Schedule of other assets consist principally of strategic investments
Other assets, net	718	1,190
Investment in Nexeon MedSystems, Inc. [Member]
Schedule of other assets consist principally of strategic investments
Other assets, net	285	285
Investment in ThermopeutiX, Inc. [Member]
Schedule of other assets consist principally of strategic investments
Other assets, net	1,185	1,185
Investment in ViaCyte, Inc. [Member]
Schedule of other assets consist principally of strategic investments
Other assets, net	559	559
Other [Member]
Schedule of other assets consist principally of strategic investments
Other assets, net	$ 84	$ 84