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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 10. Fair Value Measurements The Company is required to disclose information on the fair value of financial instruments and inputs that enable an assessment of the fair value. The three levels of the fair value hierarchy prioritize valuation inputs based upon the observable nature of those inputs as follows: Level 1 – Quoted prices in active markets for identical assets or liabilities; Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly; Level 3 – Unobservable inputs that reflect the Company’s own assumptions about the assumptions market participants would use in pricing the asset or liability. The following table presents the fair value of financial instruments recorded originally at amortized cost or fair value and not remeasured on a recurring basis (in thousands):
|  | March 31, 2024 |
Balance Sheet Classification | Type of Instrument | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Financial Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: | Money market funds | $ | 231,740 |  |  | $ | — |  |  | $ | — |  |  | $ | 231,740 |
Total Financial Assets |  | $ | 231,740 |  |  | $ | — |  |  | $ | — |  |  | $ | 231,740 |
|  | December 31, 2023 |
Balance Sheet Classification | Type of Instrument | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Financial Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | Money market funds | $ | 276,391 |  |  | $ | — |  |  | $ | — |  |  | $ | 276,391 |
Total Financial Assets |  | $ | 276,391 |  |  | $ | — |  |  | $ | — |  |  | $ | 276,391 |
The Company’s Convertible Notes and development liability are financial instruments that are reported in the consolidated financial statements at historical cost. The Convertible Notes are Level 1 within the fair value level hierarchy as of March 31, 2024 and December 31, 2023. The fair value of the Convertible Notes was $151.7 million as of March 31, 2024 and $140.8 million as of December 31, 2023. The Convertible Notes accrue a semi-annual coupon at an annual rate of 3.5%, w hich was included in accrued expenses in the condensed consolidated balance sheets as of March 31, 2024 and December 31, 2023. The fair value of the development liability was $316.9 million and $306.9 million as of March 31, 2024 and December 31, 2023, respectively. The development liability is Level 2 within the fair value hierarchy based on the discounting of fixed cash flows using an observed bond yield for borrowers with similar credit rating.

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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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