v3.7.0.1
Segment and Geographical Data - Additional Information (Detail)
12 Months Ended
Dec. 31, 2016
Segment
Segment Reporting Information [Line Items]  
Number of operating segments 3
Sales Revenue, Net [Member] | Customer 1 [Member] | Customer Concentration Risk [Member]  
Segment Reporting Information [Line Items]  
Concentration risk, percentage 25.00%
Sales Revenue, Net [Member] | Customer 2 [Member] | Customer Concentration Risk [Member]  
Segment Reporting Information [Line Items]  
Concentration risk, percentage 21.00%