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Revenue
3 Months Ended
Mar. 31, 2022
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
Revenue from sale of lidar sensor kits, which are recognized at a point in time, was $8.6 million and $6.6 million in three months ended March 31, 2022 and 2021.
The following table presents total revenues by geographic area based on the location products were shipped to and services provided (in thousands):
Three Months Ended March 31,
20222021
United States$2,863 $1,858 
North and South America, excluding United States456 366 
Asia and Pacific2,356 1,254 
Europe, Middle East and Africa2,883 3,133 
Total$8,558 $6,611