Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Statement of Comprehensive Income [Abstract]        
Net loss $ (4,903) $ (3,222) $ (13,024) $ (7,431)
Other comprehensive (loss) income:        
Foreign currency translation adjustments 27 (9) 8 (9)
Comprehensive loss $ (4,876) $ (3,231) $ (13,016) $ (7,440)