Annual report pursuant to Section 13 and 15(d)

The estimated fair value of stock options granted to employees and consultants during the years ended April 30, 2022 and 2021 were calculated using the Black-Scholes option-pricing model using the following assumptions: (Details)

v3.22.2
The estimated fair value of stock options granted to employees and consultants during the years ended April 30, 2022 and 2021 were calculated using the Black-Scholes option-pricing model using the following assumptions: (Details)
12 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Dividend yield 0.00% 0.00%
Minimum [Member] | Employees and Consultants [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Expected Term (in years) 6 years 2 months 30 days 3 years 6 months
Volatility   85.53%
Risk-free interest rate   0.31%
Maximum [Member] | Employees and Consultants [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Expected Term (in years)   6 years 2 months 30 days
Volatility 88.94% 100.10%
Risk-free interest rate 2.20% 0.51%