Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2014

Intangible Assets

Schedule of gross carrying amount and related accumulated amortization of the intangible assets

The following sets forth the gross carrying amount and related accumulated amortization of these intangible assets, in thousands:

		September 30, 2014
		(unaudited)				December 31, 2013
	Weighted-	Gross Carrying		Accumulated		Gross Carrying		Accumulated
	Average Life	Amount		Amortization		Amount		Amortization
Purchased patents	10.0	$	2,292	$	2,010	$	2,292	$	1,838
Patent defense costs		$	3,853	$	—	$	704	$	—