Goodwill and Other Intangibles

3 Months Ended

Mar. 31, 2013

Goodwill and Other Intangibles [Abstract]

Goodwill and Other Intangibles

5. Goodwill and Other Intangibles

There were no changes in the goodwill carrying amount of $13.7 million during the three months ended March 31, 2013.

The components of our identifiable intangible assets were as follows:

	March 31, 2013						December 31, 2012
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Value		Amortization		Value		Value		Amortization		Value
	(in thousands)
Patents	$	5,116	$	1,479	$	3,637	$	5,108	$	1,339	$	3,769
Trademarks and technology licenses		1,158		844		314		1,157		821		336
Customer relationships		1,764		1,064		700		1,757		1,001		756
Other intangible assets		671		357		314		673		343		330
Total identifiable intangible assets	$	8,709	$	3,744	$	4,965	$	8,695	$	3,504	$	5,191

These intangible assets are being amortized over their useful lives ranging from 1 to 15 years. The weighted-average amortization period for these intangibles as of March 31, 2013 is 6.5 years. Amortization expense is included in general and administrative expense and is as follows:

	Three months ended March 31,
	2013		2012
	(in thousands)
Amortization expense	$	262	$	241

Estimated amortization expense for the remainder of 2013 and each of the five succeeding fiscal years is as follows:

	2013		2014		2015		2016		2017		2018
	(in thousands)
Amortization expense	$	939	$	930	$	665	$	569	$	319	$	226