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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Statement of Comprehensive Income [Abstract]        
Net loss $ (1,773) $ (3,177) $ (9,409) $ (9,082)
Other comprehensive income:        
Foreign currency translation adjustments 0 1 2 2
Comprehensive loss $ (1,773) $ (3,176) $ (9,407) $ (9,080)