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CONVERTIBLE SENIOR NOTES AND CAPPED CALL - Interest Expense (Details) - Convertible Debt - Aggregate Notes - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Debt Instrument [Line Items]
Contractual interest expense	$ 453	$ 359
Amortization of debt discount	4,068	3,146
Amortization of issuance costs	57	26
Total interest expense	$ 4,578	$ 3,531

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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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-Publisher FASB
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- Definition

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

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-Publisher FASB
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- Definition

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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