Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company has evaluated events occurring subsequent to June 30, 2024 through August 8, 2024, the date the condensed consolidated financial statements were issued, and has identified the following: Vellar lawsuit In relation to the FPA, the Company’s volume-weighted average share price was below $3.00 per share for 50 trading days during the 60 day consecutive trading period ended on July 1, 2024 (the “VWAP Trigger Event”). On July 22, 2024, Vellar (one of the Purchasers) notified the Company of such VWAP Trigger Event, purporting to accelerate the Maturity Date of its portion of the Recycled Shares (i.e., 2,990,000 common shares) to July 22, 2024. Vellar asserts that it is entitled to: (i) the Maturity Consideration of $7,500 (payable at the Company’s option in cash or shares of common stock valued at the average daily VWAP Price (as defined in the FPA) over 30 scheduled trading days ending on the accelerated Maturity Date of July 22, 2024 of $1.91 per share) and (ii) a Share Consideration of $2,539, payable in cash each due and payable on July 24, 2024. On July 25, 2024 the Company received a notice from Vellar pursuant to the FPA, stating that the Company is in default of its payment obligations. On July 30, 2024, the Company received a notice of an event of default under the FPA from Vellar that (i) designated such date as the early termination date of the FPA and (ii) purports to result in an early termination cash payment of $4,164 becoming due to Vellar (equating to the sum of the Maturity Consideration and the Share Consideration minus the VWAP Price (as defined in the FPA) (as of July 29, 2024) of Vellar’s portion of the Recycled Shares). On July 24, 2024, LanzaTech filed suit against Vellar, primarily in connection with Vellar’s sale of Recycled Shares, which LanzaTech alleges are in breach of the FPA’s requirement that Recycled Shares be held in a bankruptcy remote special purpose vehicle for the benefit of the Company unless the sale is noticed to the Company as part of an early termination, which Vellar has not done. In the event of a sale of Recycled Shares subject to an optional early termination, the Company is entitled to receive approximately $10.16 for each share sold (see Note 2 - Summary of Significant Accounting Policies). LanzaTech believes that Vellar’s notice of the VWAP Trigger Event and consequently, its notice of an event of default, is not valid and accordingly, that no payments are owed to Vellar in connection with the purported acceleration of the Maturity Date or early termination of the FPA. The Company intends to vigorously pursue its claims against Vellar. Convertible Notes On August 5, 2024, the Company entered into a Convertible Note Purchase Agreement (the “Convertible Note Purchase Agreement”) with an accredited investor (the “Investor”) pursuant to which the Company agreed to sell and issue to the Investor and other purchasers in a private placement transaction (the “Private Placement”) in one or more closings up to an aggregate principal amount of $150,000 of Convertible Notes (the “Convertible Notes”). As of August 6, 2024, we issued and sold $40,150 of Convertible Notes to the Investor pursuant to the Convertible Note Purchase Agreement. The gross proceeds from the initial closing are approximately $40,000, before deducting estimated offering expenses. The Convertible Notes bear interest at a fixed rate of 8.00% per annum, which interest will be added to the outstanding principal amount of the Convertible Notes on the last day of the applicable interest period (beginning on the date of issuance of the applicable Convertible Note and ending on and including the earlier of (x) the anniversary date of such issuance and (y) the maturity date, the “Interest Period”); provided, however, that the Company is permitted to pay all interest payable during an Interest Period in cash pursuant to prior written notice to the Convertible Note holder. The Convertible Notes will mature on August 6, 2029 (the “Maturity Date”), unless earlier redeemed or converted in accordance with their terms. The Convertible Notes are subject to mandatory conversion for shares of the Company’s common stock, par value $0.0001 per share, upon the completion by the Company of an equity financing prior to the Maturity Date that results in the Company receiving minimum gross proceeds in an amount that is equal to the greater of (i) $40,000 and (ii) 50% of the total principal amount under the outstanding Convertible Notes immediately following the final closing under the Convertible Note Purchase Agreement (a “Qualified Equity Financing”) at a conversion price equal to the lower of (i) the lowest per-share selling price per share in the Qualified Equity Financing, less a 10% discount and (ii) the Valuation Cap (as defined below). The Convertible Notes are convertible at the option of the holders upon the completion by the Company of an equity financing prior to the Maturity Date that does not meet the definition of a Qualified Equity Financing (a “Non-Qualified Equity Financing”) at a conversion price equal to the lower of (i) the lowest per-share selling price in the Non-Qualified Equity Financing and (ii) the Valuation Cap. The Convertible Notes are also convertible at the option of the holders any time prior to the Maturity Date at a conversion price equal to the Valuation Cap. The “Valuation Cap” is defined as, (i) with respect to any conversion of a Convertible Note issued at the initial closing under the Convertible Note Purchase Agreement, the price per share equal $1.52 (which, in the event that the Company has not, within 60 days of the initial closing under the Convertible Note Purchase Agreement, issued Convertible Notes having an aggregate principal amount of at least $80,000, will be adjusted to $1.25 per share), and (ii) with respect to a Convertible Note issued at any closing subsequent to the initial closing under the Convertible Note Purchase Agreement, the price per share equal to the greater of (a) $1.56 and (b) the closing price per share of the Company’s common stock on the date prior to such closing. The Valuation Cap is subject to adjustment based on the Company’s holdings in LanzaJet, Inc., and the conversion price in all cases is subject to adjustment for stock splits, reclassifications, redesignations, subdivisions, recapitalizations, and dividends. The Convertible Notes contain provisions that preclude conversion if such conversion would result in the issuance of more than 19.9% of the Company’s currently outstanding common stock in the aggregate or in a change of control under Nasdaq marketplace rules, prior to obtaining stockholder approval. Prior to such stockholder approval, a holder may not convert its Convertible Note if the holder, together with its affiliates, would beneficially own more than 19.9% of the number of shares of the Company’s outstanding common stock immediately after giving effect to such exercise. The Company has agreed to use its reasonable best efforts to obtain the required stockholder approvals at a special meeting of its stockholders, to be held no later than 60 days following the date of the initial closing under the Convertible Note Purchase Agreement, subject to certain exceptions. The Convertible Notes may not be prepaid or redeemed by the Company, either in whole or in part, without the consent of the holders of the Convertible Notes representing a majority of the principal amount of all of the Convertible Notes then outstanding (the “Requisite Holders”), provided that the Company may redeem and prepay all then-outstanding Convertible Notes without such consent of the Requisite Holders (i) until August 6, 2025, in an amount equal to one and one half times the redeemed principal amount on the Convertible Notes; (ii) between August 7, 2025 and August 6, 2027, in an amount equal to two times the redeemed principal amount; and (iii) after August 6, 2027, in an amount equal to three times the redeemed principal amount; in all such cases, any and all accrued and unpaid interest on the Convertible Notes to be deemed to have been repaid in connection with the redemption. We continue to seek additional financing under the Convertible Note Purchase Agreement from certain institutional accredited investors with whom we have a preexisting substantive relationship. We currently have no commitments from any such investors to participate in the Private Placement or any other financing. There can be no assurance that we will be successful in our effort to secure additional financing in amounts and on terms acceptable to us.