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Note 4 - Accounts Receivable, Net (Tables)
 6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Accounts Receivable [Table Text Block]
    June 30,
2018		   December 31,
2017
    US$(’000)   US$(’000)
    (Unaudited)    
         
Accounts receivable    
10,131
      
10,008
  
Allowance for doubtful accounts    
(3,531
 )    
(2,793
 )
Accounts receivable, net    
6,600
      
7,215