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Geographic Information and Concentrations of Risk
6 Months Ended
Jun. 30, 2019
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
June 30,
 
Six Months Ended
June 30,
 
2019
 
2018
 
2019
 
2018
United States and Canada
$
41,459

 
$
32,562

 
$
74,953

 
$
62,668

South Africa
8,558

 
10,208

 
16,927

 
20,893

Other
5,874

 
6,287

 
12,567

 
12,229

Total
$
55,891

 
$
49,057

 
$
104,447

 
$
95,790


Concentrations of Risk
For the three months ended June 30, 2019 and 2018, one customer accounted for 56.0% and 45.1% of net revenues, respectively. For the six months ended June 30, 2019 and 2018, one customer accounted for 54.7% and 46.9% of net revenues, respectively.
As of June 30, 2019, two customers accounted for 27.3% and 11.0% of accounts receivable, net, respectively. As of December 31, 2018, two customers accounted for 30.5% and 12.8% of accounts receivable, net, respectively.