Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

Intangible assets as of December 31, 2017 and 2016 are comprised of the following (in thousands):

	December 31, 2017
	Gross amount		Accumulated amortization			Net amount
Technology	$	20,194	$	(20,194	)	$	—
Customer relationships		29,002		(29,002	)		—
Intellectual property assets		11,319		(7,258	)		4,061
Intangible assets, net	$	60,515	$	(56,454	)	$	4,061

	December 31, 2016
	Gross amount		Accumulated amortization			Net amount
Technology	$	17,903	$	(17,903	)	$	—
Customer relationships		25,712		(25,712	)		—
Intellectual property assets		9,026		(5,941	)		3,085
Intangible assets, net	$	52,641	$	(49,556	)	$	3,085