Related-Party Transactions (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2017 USD ($) bu	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) bu	Jun. 30, 2016 USD ($)
Related Party Transaction [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	$ 2,100,000		$ 2,100,000
Interest paid			55,657	$ 41,516
Corn [Member] | Other Members [Member]
Related Party Transaction [Line Items]
Supplies Purchased, Materials for Production	12,174,539	$ 12,266,960	31,826,145	$ 35,469,145
Purchase Commitment, Minimum Amount Committed, Forward Contracts	$ 4,224,695		$ 4,224,695
Supply Commitment, quantity, unpriced contracts | bu	875,000		875,000
Purchase Commitment, Remaining Minimum Amount Committed	$ 759,144		$ 759,144