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Organization and Significant Accounting Policies - Goodwill (Details) - USD ($)	3 Months Ended	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Goodwill [Line Items]
Impairment of goodwill		$ 18,359,000	$ 156,017,000	$ 156,017,000
Goodwill	$ 256,781,000	256,781,000	$ 275,652,000	$ 180,801,000
UGV
Goodwill [Line Items]
Impairment of goodwill	18,359,000
MUAS
Goodwill [Line Items]
Goodwill	$ 135,773,000	$ 135,773,000

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- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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