Major Customers	6 Months Ended
	Mar. 31, 2019
Major Customers [Abstract]
Major Customers	Major CustomerThe Company is party to the Ethanol and Distillers Grain Purchase Agreements with Bunge for the exclusive marketing, selling, and distributing of all the ethanol, distillers grains, and syrup produced by the Company. Revenues from Bunge were $50.0 million and $51.2 million for the three months ended March 31, 2019 and 2018, respectively, and $100.4 million and $99.0 million for the six months ended March 31, 2019 and 2018, respectively.