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Organization, Use of Estimates and Basis of Presentation (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023 USD ($)	Oct. 31, 2022 USD ($)	Oct. 31, 2023 USD ($) subsidiary	Oct. 31, 2022 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating subsidiaries | subsidiary			4
Disaggregation of Revenue [Line Items]
Revenue	$ 11,573	$ 14,281	$ 24,134	$ 28,026
Operating Subsidiaries
Disaggregation of Revenue [Line Items]
Revenue		$ 0		$ 0

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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.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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