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Note 7 - Other Current Assets, Net (Tables)
 6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Other Receivables [Table Text Block]
    June 30, 2020   December 31,2019
    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)            
                         
Staff advances for business operations    
15
      
-
      
15
      
11
      
-
      
11
  
Short-term loan to an unrelated party    
944
      
-
      
944
      
-
      
-
      
-
  
Overdue deposits    
706
      
(706
 )    
-
      
717
      
(717
 )    
-
  
Total    
1,665
      
(706
 )    
959
      
728
      
(717
 )    
11