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Note 12 - Goodwill (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Goodwill [Table Text Block]
    Amount
    US$(’000)
         
Balance as of January 1, 2017    
4,970
  
Exchange translation adjustment    
307
  
Balance as of December 31, 2017    
5,277
  
Impairment on goodwill    
(5,024
 )
Exchange translation adjustment    
(253
 )
Balance as of December 31, 2018    
-