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Derivative Liability (Tables)
12 Months Ended
Jul. 31, 2019
Notes to Financial Statements  
Schedule of Derivative Liabilities at Fair Value

The following table presents the activity for derivative liabilities measured at estimated fair value:

   Derivative Liability - Convertible Notes  Derivative Liability - Warrants  Derivative Liability - Downside Protection  Total
Balance as of August 1, 2017  $ —      $ —      $ —      $ —    
           
Balance as of July 31, 2018   —      —      —      —   
Additions during the year   5,178,241    353,464    6,424,338    11,956,043 
Change in fair value   988,267    (28,214)   (3,085,502)   (2,125,449)
Change due to exercise / redemptions   (2,010,312)   —      —      (2,010,312)
                   —   
Balance as of July 31, 2019  $4,156,196   $325,250   $3,338,836   $7,820,282