Convertible Senior Notes (Tables)

3 Months Ended

Oct. 31, 2020

Debt Disclosure [Abstract]

Schedule of convertible debt

The net carrying value of the liability component, unamortized debt discount and unamortized debt issuance costs of the Convertible Senior Notes was as follows (in thousands):

	October 31, 2020		July 31, 2020
Principal	$	400,000	$	400,000
Less unamortized:
Debt discount	59,487		62,508
Debt issuance costs	6,970		7,284
Net carrying amount	$	333,543	$	330,208

The effective interest rate of the Convertible Senior Notes is 5.53%. The following table sets forth the interest expense recognized related to the Convertible Senior Notes (in thousands):

	Three Months Ended October 31,
	2020		2019
Contractual interest expense	$	1,250	$	1,250
Amortization of debt discount	3,020		2,871
Amortization of debt issuance costs	315		284
Total	$	4,585	$	4,405