Debt and Financing Arrangements (Tables)

3 Months Ended

Apr. 30, 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 April 30, 2018
	(unaudited)
Contractual interest expense	$	146
Amortization of debt issuance costs	190
Amortization of debt discount	2,381
Total	$	2,717

Schedule of Liability and Equity Component of 2023 Notes

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

	As of April 30, 2018
	(unaudited)
Liability component:
Principal	$	345,000
Less: unamortized debt issuance costs and debt discount	(85,080		)
Net carrying amount	$	259,920
	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.