Equity Method Investments - Investment in Limited Partnership Fund (Details) - USD ($)	1 Months Ended		3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2022	Jul. 31, 2019	Oct. 26, 2024	Jul. 27, 2024	Oct. 28, 2023	Oct. 26, 2024	Oct. 28, 2023	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Equity Method Investments
Equity method investment income (loss), net of tax			$ 990,000		$ (1,393,000)	$ 1,055,000	$ (1,414,000)
Carrying value of investment			22,182,000			22,182,000		$ 19,933,000
Limited Partnership Fund
Equity Method Investments
Capital contributions										$ 10,000,000	$ 10,000,000
Contribution commitments										$ 0
Expected years contributions will be made		3 years
Equity method investment income (loss), net of tax			1,001,000			1,066,000
Carrying value of investment			$ 22,182,000			22,182,000		19,933,000
Limited Partnership Fund | Equity method investment loss, net of tax
Equity Method Investments
Equity method investment (loss) income					$ (1,393,000)		(1,414,000)
Income tax expense from equity method investments						$ 0	$ 0
Limited Partnership Fund, Technologies and Start-Up
Equity Method Investments
Capital contributions	$ 20,000,000			$ 1,183,000				$ 3,074,000	$ 5,778,000
Expected years contributions will be made	5 years
Additional capital contributions		$ 9,965,000