Income Taxes - Schedule of Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current income tax provision
Federal
State	26	19	8
Foreign	557	310	131
Total current income tax provision	583	329	139
Deferred income tax provision (benefit)
Federal
State
Foreign	(91)	(108)
Total deferred income tax provision (benefit)	(91)	(108)
Provision for income taxes	$ 492	$ 221	$ 139