Intangible Assets

6 Months Ended

Mar. 31, 2012

Intangible Assets and Goodwill [Abstract]

Intangible Assets

8. Intangible Assets

Intangible assets consist principally of acquired patents and technology, customer relationships, licenses and trademarks. For the three months ended March 31, 2012 and 2011, the Company recorded amortization expense of $0.2 million for each period. For the six months ended March 31, 2012 and 2011, the Company recorded amortization expense of $0.4 million for each period.

Intangible assets consisted of the following (in thousands):

	March 31, 2012
	Weighted Average Original Life (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Definite-lived intangible assets:
Customer lists		9.0	$	4,857	$	(2,464	)	$	2,393
Core technology		8.0		530		(309	)		221
Patents and other		16.8		2,255		(647	)		1,608
Subtotal				7,642		(3,420	)		4,222
Unamortized intangible assets:
Trademarks				580		—			580
Total			$	8,222	$	(3,420	)	$	4,802

	September 30, 2011
	Weighted Average Original Life (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Definite-lived intangible assets:
Customer lists		9.0	$	4,857	$	(2,195	)	$	2,662
Core technology		8.0		530		(276	)		254
Patents and other		16.8		2,308		(605	)		1,703
Subtotal				7,695		(3,076	)		4,619
Unamortized intangible assets:
Trademarks				580		—			580
Total			$	8,275	$	(3,076	)	$	5,199

Based on the intangible assets in service as of March 31, 2012, estimated amortization expense for each of the next five fiscal years is as follows (in thousands):

Remainder of 2012	$	371
2013		742
2014		742
2015		731
2016		594
2017		183

Future amortization amounts presented above are estimates. Actual future amortization expense may be different, as a result of future acquisitions, impairments, changes in amortization periods, or other factors.