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Geographic Information and Concentrations of Risk
 3 Months Ended
Mar. 31, 2022
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 March 31,
20222021
United States and Canada$52,642 $42,736 
Europe5,620 5,833 
South Africa— 7,108 
Other3,122 1,920 
Total$61,384 $57,597 
Concentrations of Risk
For the three months ended March 31, 2022, two customers accounted for 37.3% and 39.9% of net revenues, respectively. For the three months ended March 31, 2021, two customers accounted for 45.0% and 15.8% of net revenues.
As of March 31, 2022 two customers accounted for 33.0% and 26.2% of accounts receivable, net, respectively. As of December 31, 2021, two customers accounted for 61.7% and 12.6% of accounts receivable, net, respectively.