2. Summary of Significant Accounting Policies (Tables)
12 Months Ended
Jul. 31, 2017
Accounting Policies [Abstract]  
Schedule of fair value measurements
  Fair Value Measurements Using    
           
  Quoted Prices in Significant      
  Active Markets Other Significant    
  For Identical Observable Unobservable    
  Instruments Inputs Inputs Balance as of Balance as of
  (Level 1) (Level 2) (Level 3) July 31, 2017 July 31, 2016
  $ $ $ $ $
           
Assets:          
Cash 2,484 2,484 534