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Risk Management (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Jun. 30, 2017
Sep. 30, 2016
Trading Activity, Gains and Losses, Net [Line Items]            
Cash held by (due to) broker         $ 232,461 $ (435,616)
Trading Activity, Gains and Losses, Net $ 84,995 $ 887,983 $ 107,816 $ 1,893,748    
Derivative Liability, Current         251,732 497,677
Cost of Goods, Total [Member]            
Trading Activity, Gains and Losses, Net [Line Items]            
Trading Activity, Gains and Losses, Net 96,398 985,400 271,706 1,918,055    
Corn [Member]            
Trading Activity, Gains and Losses, Net [Line Items]            
Derivative assets - corn contracts         189,025 1,179,588
Derivative liabilities - corn contracts         (167,900) (118,750)
Corn [Member] | Cost of Goods, Total [Member]            
Trading Activity, Gains and Losses, Net [Line Items]            
Gain (Loss) on Sale of Derivatives 120,488 (291,288) 1,304,969 742,156    
Unrealized Gain (Loss) on Derivatives (27,550) 1,281,778 (1,039,713) 1,103,059    
Trading Activity, Gains and Losses, Net 92,938 990,490 265,256 1,845,215    
Ethanol [Member]            
Trading Activity, Gains and Losses, Net [Line Items]            
Derivative assets - corn contracts         960 38,325
Derivative liabilities - corn contracts         $ (2,814) $ (165,870)
Ethanol [Member] | Sales [Member]            
Trading Activity, Gains and Losses, Net [Line Items]            
Gain (Loss) on Sale of Derivatives (74,949) (78,288) (288,621) (7,945)    
Unrealized Gain (Loss) on Derivatives 63,546 (19,129) 124,731 (16,362)    
Trading Activity, Gains and Losses, Net (11,403) (97,417) (163,890) (24,307)    
Natural Gas [Member] | Cost of Goods, Total [Member]            
Trading Activity, Gains and Losses, Net [Line Items]            
Gain (Loss) on Sale of Derivatives 2,500 (53,840) 5,490 70,960    
Trading Activity, Gains and Losses, Net $ 3,460 $ (5,090) $ 6,450 $ 72,840