Debt - Schedule of Net Carrying Amounts of Equity Component of Notes (Details) - 0.00% Convertible Senior Notes Due January 15, 2026 - Convertible Senior Notes $ in Thousands	Jan. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt discount for conversion option	$ 70,509
Issuance costs	(1,933)
Net carrying amount	$ 68,576

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Name:	us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant