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Segments - Additional Information (Details) - Non-US - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Long-lived assets $ 5,908 $ 6,724  
Revenues $ 595 $ 1,401 $ 6,255