Intangible Assets(Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Schedule of Intangible assets
Gross Carrying Amount	$ 8,222	$ 8,275
Accumulated Amortization	(3,606)	(3,076)
Intangible assets, net	4,616	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	(2,599)	(2,195)
Intangible assets, net	2,258	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	(326)	(276)
Intangible assets, net	204	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	2,255	2,308
Accumulated Amortization	(681)	(605)
Intangible assets, net	1,574	1,703
Trademarks [Member]
Schedule of Intangible assets
Weighted Average Original Life (Years)
Gross Carrying Amount	580	580
Intangible assets, net	580	580
Definite-lived intangible assets [Member]
Schedule of Intangible assets
Gross Carrying Amount	7,642	7,695
Accumulated Amortization	(3,606)	(3,076)
Intangible assets, net	$ 4,036	$ 4,619