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Note 6 - Due From Related Parties, Net (Tables)
 9 Months Ended
Sep. 30, 2020
Due From Related Parties [Member]  
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
   
September 30,
2020
  
December 31,
2019
    US$('000)   US$('000)
    (Unaudited)    
         
Zhongwang Xiyue Technology (Beijing) Co., Ltd. (“Zhongwang Xiyue”)    
58
      
81
  
Guohua Shiji (Beijing) Communication Co., Ltd. (“Guohua Shiji”)    
176
      
172
  
     
234
      
253
  
Allowance for doubtful accounts    
(176
 )    
(172
 )
Due from related parties, net    
58
      
81