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Goodwill, Net (Tables)
12 Months Ended
May 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill, Net
Goodwill, net, consisted of the following:
 
  As of May 31, 
  2018  2019 
  US$  US$ 
Beginning balance
  15,765   33,411 
Acquisition
    16,192     55,632 
Exchange differences
  1,454   (2,502)
  
 
 
  
 
 
 
Ending balance
  33,411   86,541 
Accumulated impairment
  (1,682  (6,927)
  
 
 
  
 
 
 
Goodwill, net
  31,729   79,614