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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]    
Net loss $ (2,294) $ (29,925)
Foreign currency translation adjustments related to continuing operations 123 3,635
Foreign currency translation realized to discontinued operations 0 18,523
Comprehensive loss $ (2,171) $ (7,767)