Summary of Significant Accounting Policies and Select Balance Sheet Information (Details 6) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Schedule of Intangible assets
Gross Carrying Amount	$ 8,223	$ 8,275
Accumulated Amortization	(3,793)	(3,076)
Net	4,430	5,199
Customer lists [Member]
Schedule of Intangible assets
Weighted Average Original Life (Years)	9 years	9 years
Gross Carrying Amount	4,857	4,857
Accumulated Amortization	(2,734)	(2,195)
Net	2,123	2,662
Core technology [Member]
Schedule of Intangible assets
Weighted Average Original Life (Years)	8 years	8 years
Gross Carrying Amount	530	530
Accumulated Amortization	(343)	(276)
Net	187	254
Patents and other [Member]
Schedule of Intangible assets
Weighted Average Original Life (Years)	16 years 9 months 18 days	16 years 9 months 18 days
Gross Carrying Amount	2,256	2,308
Accumulated Amortization	(716)	(605)
Net	1,540	1,703
Definite-lived intangible assets [Member]
Schedule of Intangible assets
Gross Carrying Amount	7,643	7,695
Accumulated Amortization	(3,793)	(3,076)
Net	3,850	4,619
Trademarks [Member]
Schedule of Intangible assets
Gross Carrying Amount	580	580
Net	$ 580	$ 580