INVESTMENTS AND FAIR VALUE MEASUREMENTS - AMORTIZED COST (Details) - USD ($) $ in Thousands	Apr. 30, 2026	Apr. 30, 2025
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	$ 47,087	$ 110,153
Unrealized Gains	5,365	7,370
Unrealized Losses	(10,284)	(14,854)
Fair Value	42,168	102,669
Marketable-Equity Securities \| Equity securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost	47,087	63,677
Unrealized Gains	5,365	6,892
Unrealized Losses	(10,284)	(14,785)
Fair Value	$ 42,168	55,784
Marketable-Debt Securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost		46,476
Unrealized Gains		478
Unrealized Losses		(69)
Fair Value		46,885
Marketable-Debt Securities \| U.S. treasury securities
Debt and Equity Securities, FV-NI
Cost or Amortized Cost		32,674
Unrealized Gains		331
Unrealized Losses		0
Fair Value		33,005
Marketable-Debt Securities \| Corporate bonds
Debt and Equity Securities, FV-NI
Cost or Amortized Cost		13,802
Unrealized Gains		147
Unrealized Losses		(69)
Fair Value		$ 13,880

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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