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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Current Investments (Details) - USD ($) $ in Thousands	Jul. 31, 2025	Apr. 30, 2025
INVESTMENTS AND FAIR VALUE MEASUREMENTS
Marketable equity securities	$ 61,305	$ 55,784
U.S. treasury securities	16,046	33,005
Total Investments - current	$ 77,351	$ 88,789

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Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading), classified as current.

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Amount of investment in marketable security, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-Publisher FASB
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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(4))
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-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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-Topic 210
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