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Common Stock and Stockholders' Equity - Shares Available for Issuance (Details) - shares | Apr. 30, 2021 | Jan. 31, 2021
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shares available for grant (in shares) | 15,344,651 | 13,060,282
Total common stock reserved at period end (in shares) | 34,459,455 |
Stock options, RSUs and PSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Outstanding stock options and unvested RSUs outstanding (in shares) | 16,170,681 |
Number of shares available for grant (in shares) | 15,344,651 |
ESPP |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shares available for grant (in shares) | 2,944,123 |

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- Definition Share-based Compensation Arrangement By Share-based Payment Award, Outstanding + References No definition available. + Details
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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=120391452&loc=d3e13212-122682 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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