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Geographic Information and Concentrations of Risk
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Geographic Information and Concentrations of Risk Geographic Information and Concentrations of Risk
Geographic Information
The following table details the geographic concentration of the Company’s assets (in thousands):
 December 31,
 20212020
United States and Canada$176,094 $148,485 
Europe35,630 27,277 
South Africa— 48,211 
Other4,119 3,421 
$215,843 $227,394 
The following table details the Company’s net revenues by geographic region based on shipping destination (in thousands):
Year Ended December 31,
202120202019
United States and Canada$215,520 $260,009 $158,756 
South Africa17,333 28,208 35,001 
Other29,546 25,615 25,739 
Total$262,399 $313,832 $219,496 

Concentrations of Risk
For the year ended December 31, 2021, two customers accounted for 43.9% and 26.4% of net revenues, respectively. For the years ended December 31, 2020 and 2019 one customer accounted for 54.5% and 52.5% of net revenues, respectively.
At December 31, 2021, two customers accounted for 61.7% and 12.6% of total accounts receivable, net, respectively. At December 31, 2020, two customers accounted for 33.3% and 17.2% of total accounts receivable, net, respectively.