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Convertible Senior Notes (Tables)

6 Months Ended

Jul. 31, 2019

The net carrying value of the liability component of the Notes was as follows:



(in thousands)	July 31, 2019
Principal	$	575,000
Less: unamortized debt discount	(113,845		)
Less: unamortized transaction costs	(9,221		)
Net carrying amount	$	451,934

The net carrying amount of the equity component of the Notes was as follows:



(in thousands)	July 31, 2019
Proceeds allocated to the conversion option (debt discount)	$	134,667
Less: transaction costs	(3,336		)
Net carrying amount	$	131,331

The interest expense recognized related to the Notes was as follows:



(in thousands)	Three Months Ended July 31, 2019		Six Months Ended July 31, 2019
Contractual interest expense	$	719	$	1,429
Amortization of debt discount	6,058		12,028
Amortization of transaction costs	490		974
Total	$	7,267	$	14,431