The value of the stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Redeemable Convertible Preferred Stock (Details) $ in Thousands			12 Months Ended
	Jun. 14, 2019 USD ($) shares	Jun. 13, 2019	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)	Jan. 31, 2018 USD ($)
Temporary Equity [Line Items]
Conversion of redeemable convertible preferred stock to common stock			$ 557,912	$ 0	$ 0
Shares of common stock issuable upon conversion of redeemable convertible preferred stock \| IPO
Temporary Equity [Line Items]
Conversion of stock, shares converted \| shares	131,267,586
Conversion of stock, conversion ratio		1
Conversion of redeemable convertible preferred stock to common stock	$ 557,900