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Note 23 - Loss Per Share (Tables)
 9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
    Nine Months Ended September 30,   Three Months Ended September 30,
    2020   2019   2020   2019
    (Unaudited)   (Unaudited)   (Unaudited)   (Unaudited)
                 
Net loss attributable to ZW Data Technologies Inc. (numerator for basic and diluted loss per share)   $
(4,611
 )   $
(1,905
 )   $
(1,333
 )   $
(388
 )
                                 
                                 
Weighted average number of common shares outstanding -Basic and diluted    
21,271,301
      
16,447,233
      
21,720,259
      
16,517,440
  
                                 
Loss per share-Basic and diluted   $
(0.22
 )   $
(0.12
 )   $
(0.06
 )   $
(0.02
 )