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Stockholders' Equity (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2021 USD ($) vote $ / shares shares | Oct. 31, 2020 USD ($) | Oct. 31, 2021 USD ($) vote $ / shares shares | Oct. 31, 2020 USD ($) | Apr. 30, 2021 $ / shares shares | Nov. 30, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Preferred stock, shares authorized (in shares) | 200,000,000 |  | 200,000,000 |  |  |
Preferred stock, par value (in dollars per share) | $ / shares | $ 0.001 |  | $ 0.001 |  |  |
Preferred stock, shares issued (in shares) | 0 |  | 0 |  |  |
Preferred stock, shares outstanding (in shares) | 0 |  | 0 |  |  |
Automatic conversion period, following the death or incapacity of Mr. Siebel |  |  | 6 months |  |  |
Automatic conversion period, following the date Mr. Siebel no longer providing services |  |  | 6 months |  |  |
Automatic conversion, anniversary period, if circumstances met |  |  | 20 years |  |  |
Net proceeds common stock exercised prior to vesting | $ | $ 0.0 | $ 1.5 | $ 0.0 | $ 1.5 |  |
Stock options |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares subject to repurchase right (in shares) |  |  | 621,056 |  | 1,091,306 |
Class A Common Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Common stock, shares authorized (in shares) | 1,000,000,000 |  | 1,000,000,000 |  | 1,000,000,000 | 390,000,000
Voting rights, number of votes for each share | vote | 1 |  | 1 |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  | $ 0.001 |  | $ 0.001 |
Class B Common Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Common stock, shares authorized (in shares) | 3,500,000 |  | 3,500,000 |  | 3,500,000 | 21,000,000
Voting rights, number of votes for each share | vote | 50 |  | 50 |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  | $ 0.001 |  | $ 0.001 |

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