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Long-term Debt - Additional Information (Detail) - USD ($)
9 Months Ended
Dec. 29, 2015
Jun. 30, 2016
Jun. 30, 2015
Mar. 31, 2016
Sep. 30, 2015
Jun. 18, 2010
Debt Instrument [Line Items]            
Reduction in accrued interest payable   The interest accrued on outstanding term and working capital loans under the previous credit agreement were reduced to zero.        
Interest accrued           $ 0
Payment of principal and accrued interest   $ 33,069,000 $ 10,138,000      
Restricted account collateral for letter of credit   1,533,000     $ 4,612,000  
Standby Letter of Credit [Member]            
Debt Instrument [Line Items]            
Irrevocable and non-transferable standby letter of credit   1,500,000        
Restricted account collateral for letter of credit   $ 1,500,000        
AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Payment of principal and accrued interest $ 29,000,000          
Payment of restructuring fee 3,000,000          
Payment of waiver fee 68,750          
Term Loan [Member] | AgCountry Farm Senior Credit Agreement [Member] | Second Supplemental Agreement [Member]            
Debt Instrument [Line Items]            
Face amount of debt instrument 20,000,000          
Revolving Term Loan [Member] | AgCountry Farm Senior Credit Agreement [Member] | First Supplement Credit Agreement [Member]            
Debt Instrument [Line Items]            
Face amount of debt instrument $ 10,000,000          
Applicable Margin 3.25 % [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Decrease in applicable margin   3.25%        
Applicable Margin 3.25 % [Member] | Maximum [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Unfunded commitments   $ 20,000,000        
Applicable Margin 3.00 % [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Decrease in applicable margin   3.00%        
Applicable Margin 3.00 % [Member] | Maximum [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Unfunded commitments   $ 15,000,000        
ABE South Dakota [Member] | 2010 Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Restructuring fee paid to the lenders       $ 3,000,000    
ABE South Dakota [Member] | Term Loan [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Principal amount of term loan payable   $ 1,000,000        
Debt instrument, term   5 years        
Debt instrument, date of first required payment   Apr. 01, 2016        
Debt instrument, maturity date   Jan. 01, 2021        
Balance amount   $ 19,000,000        
ABE South Dakota [Member] | Revolving Term Loan [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Debt instrument, maturity date   Jan. 01, 2021        
Balance amount   $ 10,000,000        
Unused commitment fees   0.50%        
ABE South Dakota [Member] | One-Month LIBOR [Member] | Term Loan [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Debt instrument, basis spread on variable rate   3.50%        
ABE South Dakota [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Debt instrument, applicable interest rate   0.44%        
ABE South Dakota [Member] | 30-Day LIBOR [Member] | Revolving Term Loan [Member] | AgCountry Farm Senior Credit Agreement [Member]            
Debt Instrument [Line Items]            
Debt instrument, basis spread on variable rate   3.50%        
Other Income [Member]            
Debt Instrument [Line Items]            
Recognized gains from the Debt   $ 300,000 $ 300,000