XML 45 R34.htm IDEA: XBRL DOCUMENT v3.21.2

Fair Value Measurements (Tables)

3 Months Ended

Jul. 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 

		July 31, 2021				July 31, 2020
Dividend rate			0.0%				0.0%
Risk-free rate			0.05% - 0.06%				0.1%
Expected life (years)			0.4				1.0 - 1.4
Expected volatility			154.0%				101.8%

X

- 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

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_FairValueDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration