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Note 5 - Other Receivables, Net (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Other Receivables [Table Text Block]
    As of December 31,
    2018   2017
    US$(’000)   US$(’000)
                 
Short-term working capital loan to unrelated parties    
146
      
2,602
  
Staff advances for normal business purpose    
19
      
44
  
Overdue deposits    
1,619
      
893
  
     
1,784
      
3,539
  
Allowance for doubtful accounts    
(1,765
 )    
(893
 )
Other receivables, net    
19
      
2,646