Stock-Based Compensation (Narrative) (Details)	3 Months Ended
Jul. 31, 2022 shares
Employee Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issuable per RSU granted (shares)	1
Employee Performance-Based RSUs \| 2016 employee stock incentive plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded in period (shares)	119,772
Employee Service-Based RSUs [Member] \| 2016 employee stock incentive plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded in period (shares)	64,528
Employee Performance-Based RSTUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units non vested grants (shares)	11,945
Employee Service-Based RSTUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units non vested grants (shares)	6,490
Cliff Vest \| RSUs \| 2016 employee stock incentive plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years	3 years
Cliff Vest \| RSTUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, years	3 years

ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantsInPeriod

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- Definition

Share-based Goods and Nonemployee Services Transaction, Shares Issuable Per Restricted Stock Unit Granted

+ References

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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