Debt and Available Credit Facilities - Interest Expense in Unaudited Condensed Consolidated Statements of Net Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Amended and Restated RCA
Line of Credit Facility [Line Items]
Amortization expense	$ 1,145	$ 1,246	$ 1,129

Amount of amortization expense attributable to debt issuance costs.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(8))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-3

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration