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SUMMARY OF WARRANTS GRANTED VALUATION USING BLACK-SCHOLES PRICING METHOD (Details) - Warrant [Member] - Valuation Technique, Option Pricing Model [Member]
12 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Measurement Input, Expected Term [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Measurement input, term 2 years 2 years
Measurement Input, Expected Term [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Measurement input, term 10 years 10 years
Measurement Input, Price Volatility [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Alternative Investment, Measurement Input 1.48 1.21
Measurement Input, Price Volatility [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Alternative Investment, Measurement Input 2.80 1.44
Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Alternative Investment, Measurement Input 0.0012 0.0036
Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Alternative Investment, Measurement Input 0.0164 0.0243
Measurement Input, Expected Dividend Rate [Member]    
Property, Plant and Equipment [Line Items]    
Alternative Investment, Measurement Input 0 0