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CASH, CASH EQUIVALENTS, MARKETABLE SECURITIES AND INVESTMENTS - Narrative (Details) - USD ($) $ in Thousands, shares in Millions		1 Months Ended		6 Months Ended
	Aug. 04, 2025	Apr. 30, 2023	Feb. 28, 2023	Sep. 30, 2025	Sep. 30, 2024
Debt Securities, Available-for-sale [Line Items]
(Loss) gain on fair value of equity investment				$ (1,008)	$ 7,633
Foreign Exchange Forward | Napatech
Debt Securities, Available-for-sale [Line Items]
Number of shares acquired (in shares)		6.2	6.2
Payment for common stock			$ 7,500
Proceeds from sale of equity investment in Napatech	$ 11,800
(Loss) gain on fair value of equity investment				$ (1,000)	7,600
Unrealized gain related to foreign currency translation					$ 700

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