INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2012

INTANGIBLE ASSETS

INTANGIBLE ASSETS

12. INTANGIBLE ASSETS

The components of intangible assets at December 31 were as follows:

	2012
	Cost		Accumulated amortization		Net book value
Patents and trademarks	$	15,466	$	5,317	$	10,149
Licenses	61,660		42,134		19,526
Intellectual property	7,006		6,995		11
Customer relationships	45,065		23,474		21,591
Backlog	1,823		538		1,285
Non-compete	2,827		2,827		—
In-process research and development	6,524		2,729		3,795
	$	140,371	$	84,014	$	56,357

	2011
	Cost		Accumulated amortization		Net book value
Patents and trademarks	$	10,822	$	5,368	$	5,454
Licenses	58,842		33,325		25,517
Intellectual property	6,856		6,614		242
Customer relationships	26,565		18,499		8,066
Non-compete	2,764		2,764		—
In-process research and development	5,419		2,141		3,278
	$	111,268	$	68,711	$	42,557

Estimated annual amortization expense for the future 5 years ended December 31 were as follows:

2013	$	16,348
2014		10,700
2015		5,355
2016		4,048
2017		3,758

During the fourth quarter of 2011, we recorded an impairment charge of $11,214, primarily related to a software development program we decided not to complete.  This asset was acquired through the acquisition of Wavecom.   We did not record an impairment charge for the years ended December 31, 2012 and 2010.

Amortization expense relating to intangible assets, including those related to discontinued operations, was $16,007, $17,858, and $17,352 for the years ended December 31, 2012, 2011, and 2010, respectively.

At December 31, 2012, a net carrying amount of $1,260 included in intangible assets was not subject to amortization.