Segment Information - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Percentage of net sales in the United States	63.00%	71.00%	67.00%
Percentage of net sales outside the United States	37.00%	29.00%	33.00%
Countries representing > 10% of total net revenue	No individual international country represented more than 10% of net revenue	No individual international country represented more than 10% of net revenue	No individual international country represented more than 10% of net revenue
International
Segment Reporting Information [Line Items]
Long-lived assets outside of the United States	$ 430,000	$ 412,000