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EXIT AND DISPOSAL ACTIVITIES (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
ASSETS:      
Cash and cash equivalents $ 0 $ 845  
Other current assets 0 81  
Total current assets associated with discontinued operations 0 926  
Long-lived assets held-for-sale 0 217  
Total non-current assets associated with discontinued operations 0 217  
LIABILITIES:      
Accounts payable 0 542  
Payables for purchases of property, plant and equipment 0 359  
Other current liabilities 0 264  
Total current liabilities associated with discontinued operations 0 1,165  
Revenues     $ 7,113
Cost of revenues     (9,510)
Operating (expenses) income:      
Long-lived assets impairment     (18,770)
(Loss) income from discontinued operations, net of tax of nil $ (141) $ 1,261 $ (23,030)