Commitments and Major Customer (Details) gal in Millions	3 Months Ended				6 Months Ended		9 Months Ended
	Jun. 30, 2017 USD ($) T gal	Mar. 31, 2017 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2017 USD ($) T gal	Jun. 30, 2016 USD ($)
Revenue, Major Customer [Line Items]
Revenues (Notes 2 and 7)	$ 26,292,741		$ 27,479,673				$ 82,171,442	$ 74,343,914
Ethanol [Member]
Revenue, Major Customer [Line Items]
Ethanol receivable		$ 1,874,151			$ 1,874,151
Supply Commitment, quantity, unpriced contracts | gal	15.0						15.0
Entity-wide, major customer, unrelated party, amount		$ 21,096,610		$ 21,555,893	$ 66,369,245	$ 57,777,246
Distillers' Grains [Member]
Revenue, Major Customer [Line Items]
Supply Commitment, Remaining Minimum Amount Committed	$ 0						$ 0
Entity-wide, major customer, unrelated party, amount	3,769,434		$ 4,772,988				10,918,329	$ 13,469,206
Distillers grains receivable	$ 527,475						$ 527,475
Supply Commitment, quantity, Priced Contracts | T	11,450						11,450
Corn [Member]
Revenue, Major Customer [Line Items]
Long-term Purchase Commitment, Amount							$ 0