Summary of Significant Accounting Policies	6 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2025
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Business As of December 31, 2024, South 8 Energy, LLC (f/k/a Red Trail Energy, LLC), a North Dakota limited liability company (the “Company”), owned and operated a 50 million gallon annual name-plate production ethanol plant near Richardton, North Dakota (the “Plant”). On January 31, 2025 (the “Closing Date”) the Company completed the previously announced transaction pursuant to that certain Asset Purchase Agreement dated as of September 10, 2024 (the “Asset Purchase Agreement”) by and among the Company, Gevo, Inc. (NASDAQ: GEVO) (“Parent” or “Gevo”), and its wholly owned subsidiaries, Richardton CCS, LLC (“R-CCS”) and Net-Zero Richardton, LLC (“NZ-R”), and together with R-CCS, (the “Buyers”). Pursuant to the Asset Purchase Agreement, and subject to the terms and conditions thereof, the Buyers acquired substantially all of the assets, and assumed certain liabilities, of the Company on the terms set forth therein (such transaction, the “Asset Sale”) for $210 million (subject to adjustment based on the terms of the Asset Purchase Agreement) (the “Purchase Price”). As a result of the Asset Sale, the Company no longer maintained operation as of March 31, 2025 but had a one month period of operations from December 31, 2024 until the Closing Date (the “Operational Period”). This description does not purport to be a complete description of the Asset Purchase Agreement and is subject to and qualified in its entirety by reference to the full text of the Asset Purchase Agreement, which was filed as Exhibit 2.1 to the Current Report on Form 8-K, filed by the Company with the SEC on September 16, 2024, and is incorporated by reference. Reduced Carbon Dioxide Fuels Credits As of March 31, 2025, the Company was in the market to sell voluntary carbon dioxide reduction credits. The Company generated these credits through its carbon dioxide sequestration project. The Company held these credits in inventory for the purpose of seeking buyers who were interested in purchasing them. The Company used the inventory method of accounting for these credits and did not include these credits as assets on its balance sheet because they have negligible incremental costs associated with their generation. As of March 31, 2025, the Company has received $948,000 for carbon credit sales. When the Company entered into a contract to sell these credits, it recognized income upon transferring of the credit. Accounting Estimates Management uses estimates and assumptions in preparing these financial statements in accordance with generally accepted accounting principles. Those estimates and assumptions affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities and the reported revenues and expenses. Significant items subject to such estimates and assumptions include the useful lives of property, plant and equipment, inventory, asset retirement obligation, and allowance for credit losses. Actual results could differ from those estimates. Net Income (Loss) Per Unit Net income (loss) per unit is calculated on a basic and fully diluted basis using the weighted average units outstanding during the period.
Nature of Operations	Nature of Business As of December 31, 2024, South 8 Energy, LLC (f/k/a Red Trail Energy, LLC), a North Dakota limited liability company (the “Company”), owned and operated a 50 million gallon annual name-plate production ethanol plant near Richardton, North Dakota (the “Plant”).

SOUTH 8 ENERGY, LLC 10-Q