For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Section 50
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-Subparagraph (a)
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Credit Concentration (Details) - Customer Concentration Risk	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Accounts Receivable [Member] \| Customer A [Member]
Concentration Risk [Line Items]
Concentration risk percentage	33.80%	34.30%
Accounts Receivable [Member] \| Customer B [Member]
Concentration Risk [Line Items]
Concentration risk percentage	19.90%	22.10%
Sales Revenue, Gross [Member] \| Customer A [Member]
Concentration Risk [Line Items]
Concentration risk percentage	31.90%	30.80%	29.30%
Sales Revenue, Gross [Member] \| Customer B [Member]
Concentration Risk [Line Items]
Concentration risk percentage	16.10%	17.90%	17.20%