Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Additional Information (Detail)

v3.19.1
Segment Information - Additional Information (Detail) - Sales Revenue, Net - Customer
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Customer Concentration Risk | United States    
Segment Reporting Information [Line Items]    
Percentage of sales 59.00%  
Customer Concentration Risk | International    
Segment Reporting Information [Line Items]    
Percentage of sales 41.00%  
Geographic Concentration Risk | International    
Segment Reporting Information [Line Items]    
Number of customers which represented more than 10% of the Company's revenue 0 0