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Summary of Significant Accounting Policies - Summary of Warrants Granted Valuation using Black-Scholes Pricing Method (Details) - Warrant [Member] - Valuation Technique, Option Pricing Model [Member]	12 Months Ended
	Apr. 30, 2020
Measurement Input, Expected Dividend Rate [Member]
Measurement input, rate	0
Minimum [Member] | Measurement Input Expected Term [Member]
Measurement input, term	2 years
Minimum [Member] | Measurement Input, Price Volatility [Member]
Measurement input, rate	1.214
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Measurement input, rate	0.0036
Maximum [Member] | Measurement Input Expected Term [Member]
Measurement input, term	5 years
Maximum [Member] | Measurement Input, Price Volatility [Member]
Measurement input, rate	1.442
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Measurement input, rate	0.0243

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+ References

No definition available.

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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=117815213&loc=d3e19207-110258

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