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Investments - Available-For-Sale Securities (Details) - USD ($)	Jan. 31, 2026	Dec. 22, 2025	Apr. 30, 2025
Investments
Amortized Cost	$ 311,345,000
Gross Unrealized Gains	70,000
Gross Unrealized Losses	(55,000)
Fair Value	311,360,000
Available for sale securities			$ 0
Carrying value of investment measured at cost		$ 3,000,000
Corporate securities
Investments
Amortized Cost	189,156,000
Gross Unrealized Gains	45,000
Gross Unrealized Losses	(7,000)
Fair Value	189,194,000
U.S. government securities
Investments
Amortized Cost	112,253,000
Gross Unrealized Gains	25,000
Gross Unrealized Losses	(37,000)
Fair Value	112,241,000
Certificates of deposit
Investments
Amortized Cost	9,936,000
Gross Unrealized Losses	(11,000)
Fair Value	$ 9,925,000