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OTHER INCOME (EXPENSE), NET - Schedule of Components of Other Income (expense), Net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Income And Expenses [Abstract]      
Foreign exchange gains (loss) $ (3,880) $ (2,610) $ 619
Gain from the currency translation adjustment     1,703
Reversal of FIN45 due to expiration of the statute of limitations 1,182    
Reversal of water conservancy fund   468  
Gain on liquidation of subsidiary   909  
Aged account payable reversal 3,161    
Other 409 589 654
Total $ 872 $ (644) $ 2,976