Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Additional Information (Detail)

v3.19.2
Segment Information - Additional Information (Detail) - Sales Revenue, Net - Customer
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Customer Concentration Risk | United States        
Segment Reporting Information [Line Items]        
Percentage of sales 68.00%   63.00%  
Customer Concentration Risk | International        
Segment Reporting Information [Line Items]        
Percentage of sales 32.00%   37.00%  
Geographic Concentration Risk | International        
Segment Reporting Information [Line Items]        
Number of customers which represented more than 10% of the Company's revenue 0 0 0 0