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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents, restricted cash	$ 76,684	$ 89,324	$ 117,867	$ 116,723
Cash and cash equivalents	75,872	88,050	117,400
Restricted cash and equivalents			$ 500
Level 2 | 2028 Notes | Convertible debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 176,300	$ 171,100

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