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Cash, Cash Equivalents and Short-Term Investments - Schedule of Cash and Short Term Investments (Details) - USD ($) $ in Thousands | Apr. 30, 2023 | Jan. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 625,062 | $ 646,104
Gross Unrealized Gains | 93 | 53
Gross Unrealized Losses | (3,449) | (4,908)
Fair Value | 621,706 | 641,249
Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 315,935 | 295,402
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (2) | 0
Fair Value | 315,933 | 295,402
Cash | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 225,794 | 232,332
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 225,794 | 232,332
Money market funds | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 86,665 | 60,073
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 86,665 | 60,073
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 107,285 | 88,703
Gross Unrealized Gains | 0 | 18
Gross Unrealized Losses | (147) | (112)
Fair Value | 107,138 | 88,609
Commercial paper | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,476 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (2) |
Fair Value | 3,474 |
U.S. Agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 72,842 | 74,158
Gross Unrealized Gains | 1 | 2
Gross Unrealized Losses | (374) | (435)
Fair Value | 72,469 | 73,725
U.S. Agency securities | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost |  | 2,997
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Fair Value |  | 2,997
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 122,903 | 95,805
Gross Unrealized Gains | 92 | 33
Gross Unrealized Losses | (583) | (572)
Fair Value | 122,412 | 95,266
Municipal bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,995 | 1,989
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (9) | (19)
Fair Value | 1,986 | 1,970
Foreign government bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,222 | 2,211
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (30) | (41)
Fair Value | 2,192 | 2,170
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 317,815 | 383,238
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (2,306) | (3,729)
Fair Value | $ 315,509 | $ 379,509

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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