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Fair Value Measurements (Tables) | 9 Months Ended
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Oct. 31, 2023
Fair Value Disclosures [Abstract] |
Schedule of financial assets and liabilities measured at fair value on a recurring basis | The following tables present information about the Company’s financial assets that have been measured at fair value on a recurring basis as of October 31, 2023 and January 31, 2023 and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands):
| Fair Value Measurement as of October 31, 2023
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets: |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 244,707 |  |  | $ | — |  |  | $ | — |  |  | $ | 244,707 |
Short-term investments: |  |  |  |  |  |  |
U.S. government treasury securities | 1,447,036 |  |  | — |  |  | — |  |  | 1,447,036 |
Total financial assets | $ | 1,691,743 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,691,743 |
| Fair Value Measurement as of January 31, 2023
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets: |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |
Money market funds | $ | 268,985 |  |  | $ | — |  |  | $ | — |  |  | $ | 268,985 |
Short-term investments: |  |  |  |  |  |  |
U.S. government treasury securities | 1,380,804 |  |  | — |  |  | — |  |  | 1,380,804 |
Total financial assets | $ | 1,649,789 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,649,789 |
Schedule of Marketable Securities | The following table summarizes the amortized cost and fair value of the Company’s short-term investments by remaining contractual maturity as of October 31, 2023 and January 31, 2023 (in thousands):
| October 31, 2023 |  | January 31, 2023
| Amortized Cost |  | Unrealized Losses |  | Fair Value |  | Amortized Cost |  | Unrealized Losses |  | Fair Value
Due within one year | $ | 638,309 |  |  | $ | (1,553) |  |  | $ | 636,756 |  |  | $ | 1,383,226 |  |  | $ | (2,422) |  |  | $ | 1,380,804 |
Due after one year and within three years | 818,757 |  |  | (8,478) |  |  | 810,279 |  |  | — |  |  | — |  |  | — |
Total short-term investments | $ | 1,457,066 |  |  | $ | (10,031) |  |  | $ | 1,447,035 |  |  | $ | 1,383,226 |  |  | $ | (2,422) |  |  | $ | 1,380,804 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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