Segment, Customer and Geographic Information - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 Customer	Sep. 30, 2014 Customer	Sep. 30, 2015 Customer Segment	Sep. 30, 2014 Customer
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reporting segments | Segment			2
Number of customers accounted for more than ten percentage of revenue	0	0	0	0
Sales [Member] | Customer Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity wide revenue major customer, benchmark percentage	10.00%	10.00%	10.00%	10.00%