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Goodwill and Intangible Assets (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Goodwill [Line Items]    
Balance $ 2,832 $ 2,734
Foreign currency translation adjustment (35) 105
Goodwill impairment (675) 0
Balance $ 2,122 $ 2,839