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OTHER LONG-TERM ASSETS (Tables)
3 Months Ended
Mar. 31, 2021
OTHER LONG-TERM ASSETS [Abstract]  
Other Long-term Assets
At March 31, 2021 and December 31, 2020, other long-term assets consisted of the following:

 
 
March 31, 2021
   
December 31,
2020
 
Prepayment for property
 
$
39,474
   
$
39,450
 
Security deposit for land use right
   
750
     
756
 
Others
   
251
     
290
 
Total other long-term assets
 
$
40,475
   
$
40,496