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Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]    
Net loss $ (2,557) $ (2,228)
Foreign currency translation adjustments (1,028) 403
Reclassification adjustment for loss on liquidation of investment in MIEFE 210  
Total comprehensive loss $ (3,375) $ (1,825)