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Fair Value Measurements - Summary of Company's Assets and Liabilities that were Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Jul. 31, 2021 | Jan. 31, 2021
--- | --- | ---
Fair Value, Recurring [Member] |  |
Assets |  |
Financial Assets | $ 454,713 | $ 109,703
Liabilities |  |
Financial Liabilities | 26,868 | 75,843
Fair Value, Recurring [Member] | Redeemable Convertible Preferred Stock Warrant Liability [Member] |  |
Liabilities |  |
Financial Liabilities |  | 75,843
Private Placement Warrants [Member] | Fair Value, Recurring [Member] | Common Stock Warrant Liabilities [Member] |  |
Liabilities |  |
Financial Liabilities | 26,868 |
Money Market Funds [Member] |  |
Assets |  |
Financial Assets | 454,713 | 109,703
Level 1 | Fair Value, Recurring [Member] |  |
Assets |  |
Financial Assets | 454,713 | 109,703
Liabilities |  |
Financial Liabilities | 0 |
Level 1 | Money Market Funds [Member] |  |
Assets |  |
Financial Assets | 454,713 | 109,703
Level 3 | Fair Value, Recurring [Member] |  |
Liabilities |  |
Financial Liabilities | 26,868 | 75,843
Level 3 | Fair Value, Recurring [Member] | Redeemable Convertible Preferred Stock Warrant Liability [Member] |  |
Liabilities |  |
Financial Liabilities |  | $ 75,843
Level 3 | Private Placement Warrants [Member] | Fair Value, Recurring [Member] | Common Stock Warrant Liabilities [Member] |  |
Liabilities |  |
Financial Liabilities | $ 26,868 |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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