CONVERTIBLE SENIOR NOTES AND TERM LOAN - Schedule of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Contractual interest expense	$ 7,249	$ 8,708	$ 16,143	$ 17,680
Amortization of debt discount and issuance costs	656	1,132	1,718	2,240
Total interest expense	7,905	9,840	17,861	19,920
2024 Term Loan | Loans payable
Debt Instrument [Line Items]
Contractual interest expense	2,619		2,619
Amortization of debt discount and issuance costs	104		104
Total interest expense	2,723		2,723
2022 Term Loan | Loans payable
Debt Instrument [Line Items]
Contractual interest expense	2,611	6,592	9,466	13,471
Amortization of debt discount and issuance costs	286	768	1,110	1,542
Total interest expense	2,897	7,360	10,576	15,013
2028 Notes | Convertible debt
Debt Instrument [Line Items]
Contractual interest expense	2,019	2,036	4,058	4,050
Amortization of debt discount and issuance costs	266	255	504	482
Total interest expense	2,285	2,291	4,562	4,532
2024 Notes | Convertible debt
Debt Instrument [Line Items]
Contractual interest expense	0	80	0	159
Amortization of debt discount and issuance costs	0	109	0	216
Total interest expense	$ 0	$ 189	$ 0	$ 375