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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2025
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 3. Fair value measurements The carrying amounts of certain of the Company’s financial instruments, including cash equivalents, marketable securities, accounts payable and accrued expenses and other current liabilities approximate fair value due to their relatively short maturities and market interest rates, if applicable. For more information, refer to Note 4 regarding the fair value of the Company’s available-for-sale securities. Assets and liabilities recorded at fair value on a recurring basis in the consolidated balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Fair value is defined as the exchange price that would be received for an asset or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The authoritative guidance on fair value measurements establishes a three-tier fair value hierarchy for disclosure of fair value measurements as follows: Level 1—Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date; Level 2—Inputs (other than quoted prices included in Level 1) are either directly or indirectly observable for the asset or liability. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active; and Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. The following table presents information about the Company’s financial assets that are measured at fair value and indicates the fair value hierarchy of the valuation:
|  | March 31, 2025 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
|  | (in thousands) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 247,266 |  |  | $ | 247,266 |  |  | $ | — |  |  | $ | — |
Commercial paper |  |  | 210,544 |  |  |  | — |  |  |  | 210,544 |  |  |  | — |
Certificates of deposit |  |  | 3,836 |  |  |  | — |  |  |  | 3,836 |  |  |  | — |
U.S. government and agency securities |  |  | 957,821 |  |  |  | — |  |  |  | 957,821 |  |  |  | — |
Corporate bonds |  |  | 684,991 |  |  |  | — |  |  |  | 684,991 |  |  |  | — |
Total |  | $ | 2,104,458 |  |  | $ | 247,266 |  |  | $ | 1,857,192 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Warrant liabilities |  |  | 750 |  |  |  | 420 |  |  |  | 330 |  |  |  | — |
Total |  | $ | 750 |  |  | $ | 420 |  |  | $ | 330 |  |  | $ | — |
|  | December 31, 2024 |
|  | Total |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
|  | (in thousands) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 409,233 |  |  | $ | 409,233 |  |  | $ | — |  |  | $ | — |
Commercial paper |  |  | 245,658 |  |  |  | — |  |  |  | 245,658 |  |  |  | — |
Certificates of deposit |  |  | 9,048 |  |  |  | — |  |  |  | 9,048 |  |  |  | — |
U.S. government and agency securities |  |  | 1,051,754 |  |  |  | — |  |  |  | 1,051,754 |  |  |  | — |
Corporate bonds |  |  | 571,654 |  |  |  | — |  |  |  | 571,654 |  |  |  | — |
Total |  | $ | 2,287,347 |  |  | $ | 409,233 |  |  | $ | 1,878,114 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Warrant liabilities |  |  | 3,189 |  |  |  | 1,784 |  |  |  | 1,405 |  |  |  | — |
Total |  | $ | 3,189 |  |  | $ | 1,784 |  |  | $ | 1,405 |  |  | $ | — |
Money market funds are measured at fair value on a recurring basis using quoted prices. U.S. government debt securities, government agency bonds, certificates of deposit, commercial paper and corporate bonds are measured at fair value, which is derived from independent pricing sources based on quoted prices in active markets for similar securities. There were no transfers between Levels 1, 2 or 3 for any of the periods presented. The fair value of the warrant liabilities was based on observable listed prices for such warrants. The fair value of the public warrants is categorized as Level 1. The fair value of the private warrants is categorized as Level 2 as they are equivalent to the public warrants as they have substantially the same terms; however they are not actively traded.

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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/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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