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Debt Facilities - Estimated Annual Maturities (Details) - Heron Lake Bio-energy LLC [Member]
Apr. 30, 2016
USD ($)
Debt Instrument [Line Items]  
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months $ 519,404
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two 444,123
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three 322,980
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four 306,706
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five 326,798
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five 5,134,533
Long-term Debt $ 7,054,544