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Concentrations and Risks (Tables)
12 Months Ended
Dec. 31, 2018
Risks and Uncertainties [Abstract]  
Schedule of Company's revenues as per geographic areas
  2018   2017 
   (In thousands of
U.S. Dollars)
 
Mainland China  $89,269   $65,811 
Hong Kong China   38,106    39,738 
Germany   6,748    8,901 
United Kingdom   15,460    12,417 
Europe-Other   30,747    34,804 
Japan   7,583    3,515 
United States   30,696    25,050 
Total wholesale business   218,609    190,236 
Retail business   229,899    225,345 
Total  $448,508   $415,581