Quarterly report pursuant to Section 13 or 15(d)

The estimated fair value of warrants granted during the six months ended October 31, 2021 and 2020, were calculated using the Black-Scholes option-pricing model using the following assumptions: (Details)

v3.21.2
The estimated fair value of warrants granted during the six months ended October 31, 2021 and 2020, were calculated using the Black-Scholes option-pricing model using the following assumptions: (Details) - Number
Oct. 31, 2021
Oct. 31, 2020
Expected term (in years) 3 years 1 month 6 days  
Warrant [Member]    
Expected term (in years) 5 years 5 years
Warrant [Member] | Measurement Input, Option Volatility [Member]    
Warrants measurement input 0.8631 1.0370
Warrant [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]    
Warrants measurement input 0.87 0.27
Warrant [Member] | Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]    
Warrants measurement input 0.90 0.28
Warrant [Member] | Measurement Input, Expected Dividend Rate [Member]    
Warrants measurement input 0.000 0.000