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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 3. Fair Value Measurements The Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The Company determines fair value based on assumptions that market participants would use in pricing an asset or liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels: • Level 1 Inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date. • Level 2 Inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability. • Level 3 Inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date. On a recurring basis, the Company measures certain financial assets and liabilities at fair value. The following tables summarize the fair value of the Company’s financial assets measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):
|  |  |  | March 31, 2024 |
|  | Valuation Hierarchy |  | Amortized Cost |  |  | Gross Unrealized Holding Gains |  |  | Gross Unrealized Holding Losses |  |  | Aggregate Fair Value |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | Level 1 |  | $ | 40,150 |  |  | $ | — |  |  | $ | — |  |  | $ | 40,150 |
Commercial paper |  | Level 2 |  |  | 13,980 |  |  |  | — |  |  |  | — |  |  |  | 13,980 |
Government bonds |  | Level 2 |  |  | 86,360 |  |  |  | 1 |  |  |  | (1 | ) |  |  | 86,360 |
Total cash equivalents |  |  |  |  | 140,490 |  |  |  | 1 |  |  |  | (1 | ) |  |  | 140,490 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government bonds |  | Level 2 |  |  | 113,025 |  |  |  | 1 |  |  |  | (19 | ) |  |  | 113,007 |
Total short-term investments |  |  |  |  | 113,025 |  |  |  | 1 |  |  |  | (19 | ) |  |  | 113,007 |
|  |  |  | $ | 253,515 |  |  | $ | 2 |  |  | $ | (20 | ) |  | $ | 253,497 |
|  |  |  | December 31, 2023 |
|  | Valuation Hierarchy |  | Amortized Cost |  |  | Gross Unrealized Holding Gains |  |  | Gross Unrealized Holding Losses |  |  | Aggregate Fair Value |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | Level 1 |  | $ | 143,933 |  |  | $ | — |  |  | $ | — |  |  | $ | 143,933 |
Government bonds |  | Level 2 |  |  | 72,689 |  |  |  | — |  |  |  | — |  |  |  | 72,689 |
Total cash equivalents |  |  |  |  | 216,622 |  |  |  | — |  |  |  | — |  |  |  | 216,622 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Government bonds |  | Level 2 |  |  | 34,596 |  |  |  | 10 |  |  |  | — |  |  |  | 34,606 |
Total short-term investments |  |  |  |  | 34,596 |  |  |  | 10 |  |  |  | — |  |  |  | 34,606 |
|  |  |  | $ | 251,218 |  |  | $ | 10 |  |  | $ | — |  |  | $ | 251,228 |
For the three months ended March 31, 2024 and 2023, the Company recognized no material realized gains or losses on financial instruments.

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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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