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Nature Of Business	12 Months Ended
Nature Of Business	Sep. 30, 2019
Nature Of Business [Abstract]
Nature Of Business	Nature of Business Southwest Iowa Renewable Energy, LLC (the “Company”), located in Council Bluffs, Iowa, was formed in March 2005, operates a 140 million gallon capacity ethanol plant and began producing ethanol in February 2009. The Company sold 128.0 million gallons and 127.8 million gallons of ethanol in Fiscal 2019 and Fiscal 2018, respectively. The Company sells its ethanol distillers grains, corn syrup, and corn oil in the continental United States, Mexico and the Pacific Rim.