CONVERTIBLE SENIOR NOTES AND CAPPED CALLS - Interest Expense (Details) - Convertible Debt - Aggregate Notes - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Contractual interest expense	$ 486	$ 453	$ 1,359	$ 1,359
Amortization of debt discount	4,785	4,198	13,204	12,399
Amortization of issuance costs	140	59	185	174
Total interest expense	$ 5,411	$ 4,710	$ 14,748	$ 13,932