Convertible Senior Notes, Net (Tables)

9 Months Ended

Oct. 31, 2020

Debt Disclosure [Abstract]

Schedule of Interest Expense

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

	Three Months Ended October 31,				Nine Months Ended October 31,
	2020		2019		2020		2019
	(unaudited)
Contractual interest expense	$	27	$	99	$	154	$	530
Amortization of debt issuance costs	49		214		266		862
Amortization of debt discount	511		2,403		2,839		9,868
Total	$	587	$	2,716	$	3,259	$	11,260

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

	Three Months Ended October 31,				Nine Months Ended October 31,
	2020		2019		2020		2019
	(unaudited)
Contractual interest expense	$	332	$	188	$	994	$	188
Amortization of debt issuance costs	530		275		1,554		275
Amortization of debt discount	8,526		4,649		25,320		4,649
Total	$	9,388	$	5,112	$	27,868	$	5,112

The following table sets forth total interest expense recognized related to the 2026 Notes (in thousands):

	Three Months Ended		Nine Months Ended
	October 31, 2020
	(unaudited)
Contractual interest expense	$	1,078	$	1,653
Amortization of debt issuance costs	318		483
Amortization of debt discount	10,997		16,799
Total	$	12,393	$	18,935

Schedule of Liability and Equity Component of 2023. 2025 and 2026 Notes

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

	As of October 31, 2020
	(unaudited)
Liability component:
Principal	$	40,246
Less: unamortized debt issuance costs and debt discount	(5,115)
Net carrying amount	$	35,131
	As of October 31, 2020
	(unaudited)
Equity component:
2023 Notes	$	9,328
Less: issuance costs	(271)
Carrying amount of the equity component(1)	$	9,057

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

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

	As of October 31, 2020
	(unaudited)
Liability component:
Principal	$	1,060,000
Less: unamortized debt issuance costs and debt discount	(196,126)
Net carrying amount	$	863,874
	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 2026 Notes, net consisted of the following (in thousands):

	As of October 31, 2020
	(unaudited)
Liability component:
Principal	$	1,150,000
Less: unamortized debt issuance costs and debt discount	(304,097)
Net carrying amount	$	845,903
	At Issuance
	(unaudited)
Equity component:
2026 Notes	$	310,311
Less: issuance costs	(4,090)
Carrying amount of the equity component(1)	$	306,221

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