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OTHER LONG-TERM LIABILITIES (Tables)
9 Months Ended
Sep. 30, 2019
OTHER LONG-TERM LIABILITIES [Abstract]  
Other Long-Term Liabilities
As of September 30, 2019, and December 31, 2018, other long-term liabilities consisted of the following unearned government subsidies:

  
September 30,
2019
  
December 31,
2018
 
Subsidies to Stress Free Polishing project, commenced in 2008 and 2017
 
$
1,281
  
$
1,483
 
Subsidies to Electro Copper Plating project, commenced in 2014
  
1,456
   
2,860
 
Subsidies to Polytetrafluoroethylene, commenced in 2018
  
143
   
178
 
Other
  
100
   
62
 
Total
 
$
2,980
  
$
4,583