Accounts Receivable - Schedule of Changes in Allowance for Doubtful Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ending balance	$ (268)	$ (401)	$ (389)
Allowance for doubtful accounts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning balance	(401)	(389)	(609)
Reversal of allowance	115	6	218
Write off	0	0	0
Translation adjustments	18	(18)	2
Ending balance	$ (268)	$ (401)	$ (389)