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Warrants (Tables)
6 Months Ended
Jan. 31, 2020
Warrants Abstract  
Schedule of warrant activities

A summary of the Company’s warrant activities is as follows:

 

   Number of Warrants  Weighted Average Exercise Price per Share  Weighted Average Remaining Life (Years)  Aggregate Intrinsic Value
Outstanding - July 31, 2019   21,559,553   $1.81    0.40   $4,500,000 
Issued   88,000    2.50    4.54    —   
Forfeited   (80,000)   2.50    —      —   
Expired   (21,000,000)   1.79    0.01    —   
Outstanding - January 31, 2020   567,553   $2.50    2.70   $—