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Warrants (Tables)
6 Months Ended
Jan. 31, 2021
Warrants [Abstract]  
Schedule of warrants
   Warrants   Weighted average exercise price   Weighted average remaining contractual term (years) 
             
Outstanding at July 31, 2020   2,240,000   $0.33    1.61 
Granted   107,701,179   $0.01    9.80 
Exercised   -    -    - 
Forfeited and cancelled   (105,000)  $0.50    - 
Outstanding at January 31, 2021   109,836,179   $0.02    9.63 
Exercisable at January 31, 2021   82,610,884   $0.01    9.86