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Organization and Significant Accounting Policies - Contract Estimates (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Statement
Forward Loss Reserve	$ 1,878	$ 1,064
TMS contract
Statement
Amount of revised aggregate impact of adjustments in contract estimates on revenue related to performance obligations satisfied or partially satisfied in previous periods	$ 1,898	$ 1,124	$ 1,041

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- Definition

Carrying amount of forward loss reserves as of the balance sheet date, related to unfavorable changes in estimated costs to complete contracts.

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- Definition

Amount of revised aggregate impact of adjustments in contract estimates on revenue related to performance obligations satisfied or partially satisfied in previous periods

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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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