Quarterly report pursuant to Section 13 or 15(d)

The estimated fair value of warrants granted during the three months ended July 31, 2021 and July 31, 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 three months ended July 31, 2021 and July 31, 2020, were calculated using the Black-Scholes option-pricing model using the following assumptions (Details) - Number
Jul. 31, 2021
Jul. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Expected term (in years) 3 years 3 months 18 days  
Warrant [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Expected term (in years) 5 years 2 years 6 months
Warrant [Member] | Measurement Input, Share Price [Member] | Minimum [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Warrants measurement input 8.74 1.00
Warrant [Member] | Measurement Input, Share Price [Member] | Maximum [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Warrants measurement input 10.09 1.50
Warrant [Member] | Measurement Input, Option Volatility [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Warrants measurement input 86.31 69.35
Warrant [Member] | Measurement Input, Risk Free Interest Rate [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Warrants measurement input   2.53
Warrant [Member] | Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Warrants measurement input 0.87  
Warrant [Member] | Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Warrants measurement input 0.90  
Warrant [Member] | Measurement Input, Expected Dividend Rate [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Warrants measurement input 0.00 0.00