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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Statement of Comprehensive Income [Abstract]        
Foreign currency translation gains (losses), tax provision (benefit) $ 0 $ 0 $ 0 $ 0
Recognized income tax provision (benefit) $ 0 $ 0 $ 0 $ 0