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Note 8 - Long-term Investments (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Investments in and Advances to Affiliates, Schedule of Investments [Table Text Block]
    ChinaNet
Chuang Tou		   Guohua
Shiji		   Beijing Saturday   Total
    US$(’000)   US$(’000)   US$(’000)   US$(’000)
                 
Balance as of January 1, 2017    
1,297
      
27
      
16
      
1,340
  
Cash investment returned during the year    
(459
 )    
-
      
-
      
(459
 )
Impairment on the investments    
-
      
(29
 )    
(17
 )    
(46
 )
Exchange translation adjustment    
80
      
2
      
1
      
83
  
Balance as of December 31, 2017    
918
      
-
      
-
      
918
  
Cash investment returned during the year    
(437
 )    
-
      
-
      
(437
 )
Impairment on the investments    
(437
 )    
-
      
-
      
(437
 )
Exchange translation adjustment    
(44
 )    
-
      
-
      
(44
 )
Balance as of December 31, 2018    
-
      
-
      
-
      
-