Deferred Revenue (Tables)

12 Months Ended

Dec. 31, 2013

Revenue Recognition [Abstract]

Summary of Deferred Revenue

Deferred revenue consisted of the following at December 31 (in thousands):

	Year Ended December 31,
	2013		2012
Warranty	$	15,889	$	10,831
EVIDENCE.com		4,026		1,292
Other		304		—
Total deferred revenue		20,219		12,123
Total current portion of deferred revenue		6,878		4,287
Total long-term portion of deferred revenue	$	13,341	$	7,836