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Fair Value Measurements (Tables)

6 Months Ended

Oct. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumption

Schedule of Share-based Payment Award, Stock Options, Valuation Assumption 

		October 31, 2021				October 31, 2020
Dividend rate			0.0	%			0.0	%
Risk-free rate			0.06% - 0.08	%			0.12% - 0.13	%
Expected life (years)			0.1				0.8 - 1.1
Expected volatility			122.2	%			139.1	%

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- Definition

Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- References

No definition available.

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