Intangibles Assets, Net

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets, Net

INTANGIBLE ASSETS, NET

During the years ended December 31, 2013 and 2012, we entered into two patent assignment agreements and acquired the rights to collections of patents and patent applications.

On December 14, 2012, we acquired from Cambridge NanoTech, intangible assets of $4.3 million and other tangible assets of an insignificant amount in a cash transaction. We accounted for this transaction using the acquisition method.

As of December 31, 2013, the gross carrying amount of all our intangible assets was $18.1 million and accumulated amortization was $2.4 million. The weighted average life of all our intangible assets was 11 years as of December 31, 2013. During the years ended December 31, 2013, 2012 and 2011, our amortization expense for our intangibles was $1.5 million, $0.5 million and $0.1 million, respectively.

The following table summarizes the balances and activity of our intangibles:

(In thousands)		At December 31, 2013							At December 31, 2012
Category	Weighted Average Years	Gross Carrying Amount		Accumulated Amortization			Net Book Value		Gross Carrying Amount		Accumulated Amortization			Net Book Value
Developed technology	9 Years	$	1,080	$	(108	)	$	972	$	1,080	$	—		$	1,080
Patents	11 Years	15,946		(2,103		)	13,843		10,946		(831		)	10,115
Trade names	9 Years	209		(21		)	188		209		—			209
Customer relationships	5 Years	878		(146		)	732		878		—			878
Total		$	18,113	$	(2,378	)	$	15,735	$	13,113	$	(831	)	$	12,282

Intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. Based on the intangible assets recorded as of December 31, 2013, and assuming no subsequent additions to or impairment of the underlying assets, the remaining estimated annual amortization expense is expected to be as follows:

Year	(In thousands)
2014	$	1,740
2015	1,707
2016	1,657
2017	1,602
2018	1,479
Thereafter	7,550
Total	$	15,735