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Basis of Presentation (Tables)
3 Months Ended
Oct. 31, 2018
Basis of Presentation [Abstract]  
Summary of disaggregated revenue
  For the three months ended 
  October 31, 
  2018  2017 
       
Service revenue $1,474  $55 
Product revenue  48   - 
         
Total revenue $1,522  $55