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Inventories (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of inventories

 

   December 31,
2018
   December 31,
2017
 
   (In thousands of
U.S. Dollars)
 
Raw materials  $6,805   $2,148 
Work-in-progress   3,308    8,852 
Finished goods   55,816    45,182 
Total inventories  $65,929   $56,182