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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
   September 30,
2019
   December 31,
2018
 
   (In thousands of
U.S. Dollars)
 
Raw materials  $995   $6,805 
Work-in-progress   13,542    3,308 
Finished goods   50,751    55,816 
Total inventories  $65,288   $65,929