Intangible Assets

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS

Intangible Assets

The following table sets forth the components of intangible assets as follows (in thousands):

	December 31, 2013							December 31, 2012
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Developed and core technology	$	7,783	$	(986	)	$	6,797	$	4,400	$	(330	)	$	4,070
Customer relationships	3,800		(552		)	3,248		3,000		(225		)	2,775
Patents and trademarks	610		(284		)	326		510		(115		)	395
Non-competition agreements	450		(372		)	78		410		(154		)	256
In-process research and development	1,300		—			1,300		410		—			410
	$	13,943	$	(2,194	)	$	11,749	$	8,730	$	(824	)	$	7,906

The above intangible assets acquired in connection with the Discera acquisition in 2013, PhaseLink acquisition in 2012, and other acquired intangible assets of $2.5 million are amortized over their estimated useful lives ranging from 1 to 10 years using the straight-line method. Total intangible amortization expense for the years ended December 31, 2013, 2012 and 2011 was $1.4 million, $0.8 million and $0.3 million, respectively.

The estimated future amortization expense of intangible assets as of December 31, 2013 was as follows (in thousands):

Year Ending December 31,
2014	$	1,615
2015	1,473
2016	1,384
2017	1,155
2018	1,138
Thereafter	4,984
	$	11,749

During 2012, the Company recorded an impairment of $1.0 million as a component of research and development expense for purchased technology which was replaced by more advanced technologies.