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Note 4 - Accounts Receivable, Net (Tables)
 6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Accounts Receivable [Table Text Block]
    June 30,
2019		   December 31,
2018
    US$(’000)   US$(’000)
    (Unaudited)    
         
Accounts receivable    
8,122
      
9,752
  
Allowance for doubtful accounts    
(1,373
 )    
(3,393
 )
Accounts receivable, net    
6,749
      
6,359