Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2025
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events January 2026 Financing and Related Transactions On January 21, 2026, the Company completed a private placement of its common stock to certain existing and new institutional investors pursuant to subscription agreements, issuing 4,000,000 shares (“Subscribed Shares”) at $5.00 per share for gross proceeds of $20.0 million, and 510,968 bonus shares to such investors in consideration for funding their purchase price no later than January 21, 2026 (the “January 2026 Financing”). The securities were issued pursuant to an exemption from registration under Section 4(a)(2) of the Securities Act. These transactions do not affect the Company’s financial position or results for the periods presented. On January 21, 2026, the Company filed a Second Amended and Restated Certificate of Designation for its Series A Convertible Senior Preferred Stock, which, upon the closing of the January 2026 Financing, resulted in the automatic conversion of all outstanding shares of Preferred Stock into 3,250,322 shares of common stock (the “Preferred Stock Conversion”) and eliminated the Preferred Stock’s mandatory redemption provisions. The Preferred Stock Conversion occurred after year‑end and does not affect previously reported results. Concurrently with the January 2026 Financing and pursuant to the Preferred Stock Purchase Agreement, the Company issued to the Preferred Stockholder the PIPE Warrant. The PIPE Warrant is exercisable at any time prior to 5:00 p.m. New York City time on December 31, 2026 (the “Expiration Time”), and, if unexercised, will be automatically exercised on a cashless (net‑share) basis immediately prior to the Expiration Time. LanzaJet Transaction In connection with the foregoing, the Company and the preferred stockholder entered into a waiver under which the stockholder waived the original deadline for filing a resale registration statement for the warrant shares; the Company agreed to file such registration within 60 business days following issuance of the warrant shares. On February 11, 2026, LanzaTech, Inc., a wholly owned subsidiary of the Company, entered into a Series A Preferred Stock Purchase and Exchange Agreement (the “LanzaJet Series A Stock Purchase Agreement”) with LanzaJet and certain investors (the “Series A Investors”). The Series A Stock Purchase Agreement provides for (i) the issuance and sale by LanzaJet of its Series A Preferred Stock, (ii) the exchange by certain holders of LanzaJet common stock and warrants for newly created Class C common stock and corresponding warrants on a 1:1 basis, and (iii) the exchange or conversion of certain LanzaJet convertible securities into newly created preferred stock of LanzaJet (collectively, the “Series A Transaction”). The Series A Transaction may occur in one or more closings, including an initial closing that occurred effective February 11, 2026 (the “Initial Closing”). At the Initial Closing, the Company purchased 455,522 shares of Series A Preferred Stock for an aggregate purchase price of $2.0 million and exchanged 60,316,250 shares of LanzaJet common stock for 60,316,250 shares of newly issued Class C Common Stock. In connection with the Series A Transaction, LanzaJet filed a Fifth Amended and Restated Certificate of Incorporation with the Secretary of State of the State of Delaware to authorize the Series A Preferred Stock and Class C Common Stock and to establish the rights and preferences of these securities. LanzaJet, the Company and certain other stockholders also entered into a Third Amended and Restated Stockholders’ Agreement, which, among other matters, updates governance, transfer and other provisions and provides the Company with the right to designate one member of the seven‑member LanzaJet board of directors so long as the Company and its affiliates beneficially own at least 5% of LanzaJet’s fully diluted common shares. As a result of the Series A Transaction, the Company’s ownership interest in LanzaJet decreased from approximately 53% as of December 31, 2025 to approximately 46% on a fully diluted basis as of February 11, 2026. The Company continues to account for its investment in LanzaJet under the equity method of accounting. The agreements entered into in connection with the Series A Transaction will be filed as exhibits to the Company’s Annual Report on Form 10‑K for the year ended December 31, 2025. Second Amendment to Note Purchase Agreement On February 11, 2026, FPF and the holders of the LanzaJet Notes entered into a Second Amendment to Note Purchase Agreement (the “Second NPA Amendment”). Among other changes, the Second NPA Amendment (i) amended the repayment terms of the LanzaJet Notes to defer the commencement of principal payments until the later of the first semi-annual payment date following the six-month anniversary of the commencement of commercial operations and June 30, 2027 and (ii) permits up to $25.0 million in debt to rank senior in priority to the LanzaJet Notes. Litigation Matters In February 2026, the Company and Vellar agreed to settle all outstanding litigation matters. As part of the settlement, the Company made a cash payment to Vellar in February 2026. The parties filed stipulations of voluntary dismissal, which were granted on March 5, 2026. Accordingly, the FPA litigation has been concluded. With respect to the Schara Litigation, the Director Defendants have agreed to a settlement which was approved by the Court on March 4, 2026, and will be funded by the Company in April. This settlement did not affect the Company’s financial position or results for the periods presented. On January 27, 2026 with respect to the Convertible Note litigation, the Appellate Division, First Department of the Supreme Court unanimously affirmed the Supreme Court’s dismissal of Carbon Direct Capital’s complaint in full. The deadline for Carbon Direct Capital to file an application for leave to appeal to the New York Court of Appeals was February 26, 2026, and no application was filed. Management evaluated the impact of all of the above transactions and where applicable determined that they represent non‑recognized subsequent event under ASC 855. Accordingly, no adjustments have been made to the accompanying consolidated financial statements as of and for the year ended December 31, 2025.