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CONVERTIBLE SENIOR NOTES AND CAPPED CALL - Interest Expense (Details) - Convertible Debt - Aggregate Notes - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Debt Instrument [Line Items]
Contractual interest expense	$ 453	$ 360	$ 906	$ 719
Amortization of debt discount	4,133	3,198	8,201	6,344
Amortization of issuance costs	58	27	115	53
Total interest expense	$ 4,644	$ 3,585	$ 9,222	$ 7,116

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- Definition

Amortization of Debt Discount

+ References

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- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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-Publisher FASB
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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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