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Common Stock and Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Details)	Jan. 31, 2020 shares
Class of Stock [Line Items]
Common stock reserved for future issuance and options and unvested RSUs outstanding (in shares)	37,362,403
Options and unvested RSUs outstanding
Class of Stock [Line Items]
Options and unvested RSUs outstanding (in shares)	17,252,543
Common stock, reserved for future issuance (in shares)	16,456,003
ESPP
Class of Stock [Line Items]
Common stock, reserved for future issuance (in shares)	3,653,857

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- Definition

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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