Reconciliation of Changes in Inventory Reserve (Detail) (Inventory Valuation Reserve, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Inventory Valuation Reserve
Schedule Of Inventory [Line Items]
Balance at beginning of year	$ 2,185	$ 1,127	$ 572
Expense	779	1,307
Inventory write off	(6)	(215)	(10)
Adjustment due to currency translation	(25)	(34)	33
Balance at end of year	$ 2,933	$ 2,185	$ 1,127