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Summary of Significant Accounting Policies - Summary of Warrants Granted Valuation using Black-Scholes Pricing Method (Tables)
12 Months Ended
Apr. 30, 2020
Accounting Policies [Abstract]  
Summary of Warrants Granted Valuation using Black-Scholes Pricing Method

The warrants granted during the year ended April 30, 2020 and 2019 were valued using the Black-Scholes pricing method on the date of grant using the following assumptions below.

 

    2020   2019
Expected life in years   2 - 5 years   NA
Stock price volatility   121.4% - 144.2%   NA
Risk free interest rate   0.36% - 2.43%   NA
Expected dividends   0%   NA