Equity Method Investments - Investment in Limited Partnership Fund (Details) - USD ($)		1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 30, 2025	Mar. 31, 2022	Jul. 31, 2019	Jan. 31, 2026	Jan. 25, 2025	Jan. 31, 2026	Jan. 25, 2025	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Equity Method Investments
Equity method investment gain (loss), net of tax				$ (295,000)		$ 2,688,000	$ 1,055,000
Limited Partnership Fund
Equity Method Investments
Capital contributions	$ 528,000										$ 10,000,000	$ 10,000,000
Contribution commitments											$ 0
Equity method investment gain (loss), net of tax				(295,000)	$ 0	2,688,000	1,066,000
Carrying value of equity method investments				35,923,000		35,923,000		$ 30,423,000
Limited Partnership Fund | Equity method investment loss, net of tax
Equity Method Investments
Income tax expense from equity method investments				$ 0	$ 0	0	$ 0
Limited Partnership Fund, Technologies and Start-Up
Equity Method Investments
Capital contributions		$ 20,000,000				$ 3,244,000		$ 5,674,000	$ 3,074,000	$ 5,778,000
Expected years contributions will be made		5 years
Additional capital contributions			$ 2,230,000