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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
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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

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- Definition Value of input used to measure alternative investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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