Foreign Operations - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Mar. 31, 2013	Sep. 30, 2013
Foreign Operations [Line Items]
Initiation date of manufacturing work stoppage		Mar. 07, 2013
End date of manufacturing work stoppage		Mar. 20, 2013
Adverse impact of work stoppage on revenues	$ 900,000
Incremental costs of work stoppage		$ 662,000