Convertible Senior Notes, Net (Tables)

3 Months Ended

Apr. 30, 2020

Debt Disclosure [Abstract]

Schedule of Interest Expense

The following table sets forth total interest expense recognized related to the 2025 Notes (in thousands):

	Three Months Ended April 30,
	2020
	(unaudited)
Contractual interest expense	$	331
Amortization of debt issuance costs	506
Amortization of debt discount	8,354
Total	$	9,191

The following table sets forth total interest expense recognized related to the 2023 Notes (in thousands):

	Three Months Ended April 30,
	2020		2019
	(unaudited)
Contractual interest expense	$	75	$	216
Amortization of debt issuance costs	127		319
Amortization of debt discount	1,370		3,706
Total	$	1,572	$	4,241

Schedule of Liability and Equity Component of 2023 and 2025 Notes

The 2025 Notes, net consisted of the following (in thousands):

	As of April 30, 2020
	(unaudited)
Liability component:
Principal	$	1,060,000
Less: unamortized debt issuance costs and debt discount	(214,138		)
Net carrying amount	$	845,862
	At Issuance
Equity component:
2025 Notes	$	221,387
Less: issuance costs	(4,040		)
Carrying amount of the equity component(1)	$	217,347

⁽¹⁾ Included in the condensed consolidated balance sheets within Additional paid-in capital.

The 2023 Notes, net consisted of the following (in thousands):

	As of April 30, 2020
	(unaudited)
Liability component:
Principal	$	120,586
Less: unamortized debt issuance costs and debt discount	(18,388		)
Net carrying amount	$	102,198
	As of April 30, 2020
Equity component:
2023 Notes	$	27,949
Less: issuance costs	(811		)
Carrying amount of the equity component(1)	$	27,138

⁽¹⁾ Included in the condensed consolidated balance sheets within Additional paid-in capital.