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Goodwill and Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Goodwill and Intangible Assets    
Balance $ 2,108 $ 2,050
Foreign currency translation adjustment (39) 12
Balance $ 2,069 $ 2,062