CONVERTIBLE SENIOR NOTES AND TERM LOAN - Schedule of Convertible Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Mar. 31, 2024
Debt Instrument [Line Items]
Principal	$ 401,914	$ 426,914
Unamortized debt discount and issuance costs	(5,027)	(17,224)
Net carrying amount	396,887	409,690
Current portion of long-term debt	39,393	0
Non-current portion of long-term debt	357,494	409,690
Loans payable | 2024 Term Loan
Debt Instrument [Line Items]
Principal	200,000
Unamortized debt discount and issuance costs	(1,413)
Net carrying amount	198,587
Current portion of long-term debt	39,393
Non-current portion of long-term debt	159,194
Loans payable | 2022 Term Loan
Debt Instrument [Line Items]
Principal	0	225,000
Unamortized debt discount and issuance costs	0	(13,106)
Net carrying amount	0	211,894
Current portion of long-term debt	0	0
Non-current portion of long-term debt	0	211,894
Convertible debt | 2028 Notes
Debt Instrument [Line Items]
Principal	201,914	201,914
Unamortized debt discount and issuance costs	(3,614)	(4,118)
Net carrying amount	198,300	197,796
Current portion of long-term debt	0	0
Non-current portion of long-term debt	$ 198,300	$ 197,796