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Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]        
Net loss $ (1,938) $ (1,059) $ (4,903) $ (3,554)
Other comprehensive income:        
Foreign currency translation adjustment, net (866) 61 (491) 102
Total comprehensive loss $ (2,804) $ (998) $ (5,394) $ (3,452)