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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 following tables present information about the Company’s assets and liabilities that are regularly measured and carried at fair value on a recurring basis and indicate the level within the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value, which is described further within Note 2 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. Financial assets and liabilities measured at fair value on a recurring basis are summarized as follows (in thousands):
| ​ | March 31, 2024 |
| ​ | Level 1 |  | ​ | Level 2 |  | ​ | Level 3 |
Assets | ​ |  |  | ​ |  |  | ​ |  |
Cash equivalents: | ​ |  |  | ​ |  |  | ​ |  |
Money market funds | ​ | $ | 57,712 |  | ​ | $ | — |  | ​ | $ | — |
U.S. Treasury notes | ​ |  | — |  | ​ |  | 264,004 |  | ​ |  | — |
Total | ​ | $ | 57,712 |  | ​ | $ | 264,004 |  | ​ | $ | — |
| ​ | December 31, 2023 |
| ​ | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets | ​ |  |  | ​ |  |  | ​ |  |
Cash equivalents: | ​ |  |  | ​ |  |  | ​ |  |
Money market funds | ​ | $ | 55,001 |  | ​ | $ | — |  | ​ | $ | — |
U.S. Treasury notes | ​ |  | — |  | ​ |  | 255,419 |  | ​ |  | — |
Total | ​ | $ | 55,001 |  | ​ | $ | 255,419 |  | ​ | $ | — |
The fair value of the Company’s Level 1 cash equivalents, consisting of money market funds, is based on quoted market prices in active markets with no valuation adjustment. The fair value of the Company’s Level 2 cash equivalents, consisting of U.S. Treasury notes with original maturities of three months or less, is determined through third-party pricing services. The amortized cost of the U.S. treasury notes approximates the fair value. There have been no impairments of the Company’s assets measured and carried at fair value during the three months ended March 31, 2024 and 2023. In addition, there were no changes in valuation techniques or transfers between Level 1, Level 2 and Level 3 financial assets during the three months ended March 31, 2024 and 2023. The Company did not have any non-recurring fair value measurements on any assets or liabilities during the three months ended March 31, 2024 and 2023. On August 9, 2022, Gemini Therapeutics, Inc., a Delaware corporation (“Gemini”), Gemstone Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Gemini (“Merger Sub”), and Disc Medicine, Inc., a Delaware corporation (“Private Disc”), entered into an Agreement and Plan of Merger and Reorganization (the “Merger Agreement”). The merger was completed on December 29, 2022. As described in Note 1 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, in connection with the merger, the stockholders of Gemini at the effective time of the merger received a CVR to receive consideration from the Company upon its receipt of certain proceeds, resulting from a disposition of Gemini’s pre-merger assets within one year after the closing of the merger, calculated in accordance with the CVR Agreement. The disposition period ended December 29, 2023 and no dispositions of Gemini's pre-merger assets were made during the disposition period. Therefore, the CVR obligation no longer existed as of March 31, 2024 and December 31, 2023, respectively. The change in fair value of the CVR liability was de minimis for the three months ended March 31, 2023.

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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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