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Segment Information - Long-Lived Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 20,868 $ 17,279
United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets 19,184 17,279
India    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived assets $ 1,684 $ 0