Income Taxes - 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:
Federal, Current
State, Current	178	23	29
Foreign, Current	2,349	282	437
Total current	2,527	305	466
Deferred:
Federal, Deferred
State, Deferred
Foreign, Deferred	61	(169)	23
Total deferred	61	(169)	23
Provision for income taxes	$ 2,588	$ 136	$ 489