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Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of land use rights

 

   2018   2017 
   (In thousands of
U.S. Dollars)		 
Land use rights  $5,702   $5,475 
Less: accumulated amortization   (740)   (566)
Land use rights, net  $4,962   $4,909