XML 46 R35.htm IDEA: XBRL DOCUMENT v3.20.2

Fair Value Measurements (Tables)

6 Months Ended

Oct. 31, 2020

Fair Value Disclosures [Abstract]

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

The Company determined the fair value using the Black-Scholes option pricing model with the following assumptions:

		October 31, 2020				October 31, 2019
Dividend rate			0.0	%			0.0	%
Risk-free rate			0.12% - 0.13	%			1.5	%
Expected life (years)			0.8 - 1.1				1.7 - 2.1
Expected volatility			139.1	%			105.9	%

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration