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Segment and Geographic Information
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Segment and Geographic Information Segment and Geographic Information
The Company has one business activity, which is radiation therapy technology combined with magnetic resonance imaging, and operates in one reportable segment. The Company’s chief operating decision-maker, its chief executive officer, reviews its operating results on an aggregate basis for purposes of allocating resources and evaluating financial performance. Also, the Company does not have segment managers as the Company manages its operations as a single operating segment.
The following table sets forth revenue by geographic area based on the shipping address of the customers’ location (in thousands):
Year Ended December 31,
202120202019
United States$42,168 $16,167 $46,236 
France7,868 7,025 12,235 
Taiwan4,870 10,710 — 
United Kingdom1,173 6,060 5,974 
Rest of world14,040 17,055 23,337 
Total revenue$70,119 $57,017 $87,782 
At December 31, 2021 and 2020, nearly all long-lived assets are located in the United States.