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Fair Value Measurements | 9 Months Ended
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Oct. 31, 2023
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements 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 |
The Company utilized the market approach and Level 1 valuation inputs to value its money market mutual funds and U.S. government treasury securities because published net asset values were readily available. 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 |
As of October 31, 2023 and January 31, 2023, unrealized losses on the Company’s U.S. government treasury securities were approximately $10.0 million and $2.4 million, respectively. These unrealized losses were caused by interest rate increases, which resulted in the decrease in market value of these securities. Because the decline in fair value is due to changes in interest rates and not credit quality, and because the Company does not intend to sell the investments and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized cost bases, which may be at maturity, the Company concluded that an allowance for credit losses was unnecessary for short-term investments as of October 31, 2023. Gross realized gains and losses were not material for each of the three and nine months ended October 31, 2023 and 2022. There were no short-term investments in a continuous loss position for greater than twelve months. Convertible Senior Notes The Company measures the fair value of its outstanding convertible senior notes on a quarterly basis for disclosure purposes. The Company considers the fair value of its convertible senior notes at October 31, 2023 to be a Level 2 measurement due to limited trading activity of the convertible senior notes. Refer to Note 5, Convertible Senior Notes, for further details. Non-marketable Securities As of October 31, 2023 and January 31, 2023, the total amount of non-marketable equity and debt securities included in other assets on the Company’s condensed consolidated balance sheets were $13.1 million and $9.8 million, respectively. During the nine months ended October 31, 2023 and 2022, the Company invested an additional $2.1 million and $2.7 million, respectively, of its cash in non-marketable equity securities. The Company recognized net unrealized gains on certain of these non-marketable securities of $1.3 million and $1.7 million during the nine months ended October 31, 2023 and 2022, respectively. No unrealized gain or loss was recognized during the three months ended October 31, 2023 and 2022. Refer to Note 2, Summary of Significant Accounting Policies, in the Notes to Consolidated Financial Statements included in Part II, Item 8 of the Company’s 2023 Form 10-K for further information. The Company considers these assets as Level 3 within the fair value hierarchy. The estimation of fair value for these investments is inherently complex due to the lack of readily available market data and inherent lack of liquidity and requires the Company’s judgment and the use of significant unobservable inputs in an inactive market. In addition, the determination of whether an orderly transaction is for the identical or a similar investment requires significant management judgment, including understanding the differences in the rights and obligations of the investments, the extent to which those differences would affect the fair values of those investments and the stage of operational development of the entities.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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