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Geographic Information and Concentrations of Risk
9 Months Ended
Sep. 30, 2018
Segment Reporting [Abstract]  
Geographic Information and Concentrations of Risk
Geographic Information and Concentrations of Risk
Geographic Information
The following table details the Company’s net revenues by geographic region based on shipping destination (in thousands):
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
2018
 
2017
 
2018
 
2017
United States and Canada
$
35,891

 
$
42,056

 
$
98,559

 
$
125,969

South Africa
9,145

 
9,754

 
30,038

 
29,694

Other
5,594

 
5,651

 
17,823

 
17,100

Total
$
50,630

 
$
57,461

 
$
146,420

 
$
172,763


Concentrations of Risk
For the three months ended September 30, 2018, one customer accounted for 46.9% of net revenues. For the three months ended September 30, 2017, two customers accounted for 48.0% and 14.9% of net revenues, respectively. For the nine months ended September 30, 2018, one customer accounted for 46.6% of net revenues. For the nine months ended September 30, 2017, two customers accounted for 49.6% and 11.4% of net revenues, respectively.
As of September 30, 2018, one customer accounted for 35.9% of accounts receivable, net. As of December 31, 2017, one customer accounted for 23.9% of accounts receivable, net.