Debt and Financing Arrangements (Tables)

9 Months Ended

Oct. 31, 2018

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, 2018		Nine Months Ended October 31, 2018
	(unaudited)
Contractual interest expense	$	215	$	577
Amortization of debt issuance costs	299		777
Amortization of debt discount	3,604		9,539
Total	$	4,118	$	10,893

Schedule of Liability and Equity Component of 2023 Notes

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

	As of October 31, 2018
	(unaudited)
Liability component:
Principal	$	345,000
Less: unamortized debt issuance costs and debt discount	(77,335		)
Net carrying amount	$	267,665
	At Issuance
	(unaudited)
Equity component:
2023 Notes	$	79,962
Less: issuance costs	(2,320		)
Carrying amount of the equity component(1)	$	77,642

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