Debt - Convertible Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 06, 2022	Jan. 31, 2021	Apr. 30, 2018
Liability:
Less: debt issuance costs, net of amortization			$ (12,900)
Stockholders' equity recorded at issuance:
Less: debt issuance costs			(12,900)
Convertible Senior Notes
Liability:
Principal	$ 575,000	$ 575,000
Less: debt discount, net of amortization	(35,641)	(64,515)
Less: debt issuance costs, net of amortization	(2,580)	(4,671)	(9,800)
Net carrying amount of the Notes	536,779	505,814
Stockholders' equity recorded at issuance:
Less: debt issuance costs	(2,580)	$ (4,671)	(9,800)
Additional Paid-In Capital
Liability:
Less: debt issuance costs, net of amortization	(3,068)		(3,100)
Stockholders' equity recorded at issuance:
Allocated value of the conversion feature	136,333
Less: debt issuance costs	(3,068)		$ (3,100)
Additional paid-in capital	$ 133,265