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Note 7 - Other Current Assets, Net (Tables)
 3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Other Current Assets [Table Text Block]
    March 31, 2019   December 31,2018
      Gross       Allowance for doubtful accounts       Net       Gross       Allowance for doubtful accounts       Net  
      US$(’000)       US$(’000)       US$(’000)       US$(’000)       US$(’000)       US$(’000)  
      (Unaudited)       (Unaudited)       (Unaudited)              
                         
Loan to an unrelated party    
149
      
(149
 )    
-
      
146
      
(146
 )    
-
  
Staff advances for business operations    
9
      
-
      
9
      
19
      
-
      
19
  
Overdue deposits    
1,650
      
(1,650
 )    
-
      
1,619
      
(1,619
 )    
-
  
Total    
1,808
      
(1,799
 )    
9
      
1,784
      
(1,765
 )    
19