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Long Term Debt and Interest Rate Swaps (Details) (USD $)
 3 Months Ended 6 Months Ended 3 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 3 Months Ended 1 Months Ended 12 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2014
Jul. 31, 2013
Jan. 31, 2014
Jul. 31, 2014
Interest Rate Swap One [Member]
One Earth Energy [Member]
Jan. 31, 2014
Interest Rate Swap One [Member]
One Earth Energy [Member]
Jul. 31, 2009
Interest Rate Swap One [Member]
One Earth Energy [Member]
Jul. 31, 2014
Term Loan [Member]
Minimum [Member]
One Earth Energy [Member]
Jul. 31, 2014
Term Loan [Member]
Maximum [Member]
One Earth Energy [Member]
Jul. 31, 2014
Term Loan [Member]
One Earth Energy [Member]
Jan. 31, 2014
Term Loan [Member]
One Earth Energy [Member]
Nov. 30, 2011
Term Loan [Member]
Nu Gen Energy [Member]
Apr. 30, 2014
Term Loan [Member]
Nu Gen Energy [Member]
Jul. 31, 2014
Term Loan [Member]
Nu Gen Energy [Member]
Jan. 31, 2014
Term Loan [Member]
Nu Gen Energy [Member]
Jul. 31, 2014
Revolving Credit Facility [Member]
One Earth Energy [Member]
Jan. 31, 2014
Revolving Credit Facility [Member]
One Earth Energy [Member]
Nov. 30, 2011
Revolving Credit Facility [Member]
Nu Gen Energy [Member]
Jan. 31, 2014
Revolving Credit Facility [Member]
Nu Gen Energy [Member]
Apr. 30, 2014
Revolving Credit Facility [Member]
Nu Gen Energy [Member]
Jul. 31, 2014
Maximum [Member]
Nu Gen Energy [Member]
Jul. 31, 2014
One Earth Energy [Member]
Nov. 30, 2011
Nu Gen Energy [Member]
Jul. 31, 2014
Nu Gen Energy [Member]
Jan. 31, 2014
Nu Gen Energy [Member]
Long Term Debt and Interest Rate Swaps (Details) [Line Items]                                                    
Debt Instrument Refinanced Amount                                             $ 44,101,000      
Debt Instrument Refinanced Amount Interest Rate                                             LIBOR plus 300 basis points   LIBOR plus 300 basis points  
Debt Instrument, Interest Rate, Effective Percentage                 3.20%                                  
Long term debt, quarterly principle payments                     2,000,000                              
Long Term Debt Maturities Quarterly Principal Payment Due Beginning Date                                             Jan. 08, 2014      
Debt Instrument Maximum Payment Aggregate                 6,000,000                                  
Long-term Debt, Excess Cash Flow Principle Payments, Maximum                   18,000,000                                
Debt Instrument, Annual Principal Payment                                             6,000,000   6,000,000  
Long-term Debt, Gross                     32,000,000 39,100,000                            
Line of Credit Facility, Maximum Borrowing Capacity                                 10,000,000                  
Debt Instrument, Maturity Date                                 Jul. 31, 2015                  
Debt Instrument, Description of Variable Rate Basis                                 LIBOR plus 265 basis points                  
Long-term Line of Credit                                 0 0   0 0          
Payments of Financing Costs                     1,400,000                     600,000        
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries                     100,700,000 86,900,000                         96,300,000 66,100,000
Derivative Liability, Notional Amount               50,000,000                                    
Debt Instrument, Basis Spread on Variable Rate           7.90%                                        
Derivative Liability 371,000   371,000   1,141,000 400,000 1,100,000               30,000,000 36,600,000                    
Derivative Settlement on Interest Rate Swap 376,000 422,000 774,000 862,000                                     400,000      
Gain (Loss) on Derivative Instruments, Net, Pretax (1,000) (10,000) (5,000) (6,000)                                     5,000      
Proceeds from Bank Debt                         $ 55,000,000           $ 10,000,000 $ 10,000,000       $ 65,000,000    
Debt Instrument, Frequency of Periodic Payment                                                 20 quarterly payments  
Debt Instrument Principal Payments As Percentage Of Annual Excess Cash Flows                           20.00%                        
Line of Credit Facility, Interest Rate Description                                                 LIBOR plus 275 basis points