Debt - Schedule of Net Carrying Amounts of Liability Component of Notes (Details) - 0.00% Convertible Senior Notes Due January 15, 2026 - Convertible Senior Notes - USD ($)	Oct. 31, 2021	Jan. 31, 2021
Debt Instrument [Line Items]
Principal	$ 345,000,000	$ 345,000,000.0
Unamortized debt discount for conversion option		(69,916,000)
Unamortized issuance costs	(8,007,000)	(7,470,000)
Net carrying amount	$ 336,993,000	$ 267,614,000