XML 56 R41.htm IDEA: XBRL DOCUMENT v3.7.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
 12 Months Ended
Jan. 31, 2017
USD ($)
shares
Jan. 31, 2016
USD ($)
Jan. 31, 2015
USD ($)
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Number of Ethanol Entities Under Ownership Interest 3    
Concentration Risk Number of Customer 5 4 4
Property, Plant and Equipment, Depreciation Methods Depreciation is computed using the straight-line method.    
Impairment of Real Estate   $ 125,000 $ 68,000
Depreciation $ 19,519,000 18,638,000 16,387,000
Interest Paid     2,136,000
Assets $ 454,024,000 414,685,000  
Derivative Settlement on Interest Rate Swap     $ 1,142,000
Employee Stock Ownership Plan (ESOP), Shares in ESOP (in Shares) | shares 550,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value   4,000,000  
Deferred Tax Expense from Stock Options Exercised   $ 800,000  
Customer Concentration Risk [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Concentration Risk, Percentage 83.00% 75.00% 74.00%
Accounts Receivable Balance [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Concentration Risk, Percentage 88.00% 47.00%  
Cost of Sales [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Maximum Percentage of Equity Ownership Interest Which May be Considered for Equity Method of Accounting 20.00%    
Building and Building Improvements [Member] | Minimum [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 15    
Building and Building Improvements [Member] | Maximum [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 40 years    
Fixtures And Equipment [Member] | Minimum [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 2    
Fixtures And Equipment [Member] | Maximum [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 20 years    
Not Accounted For Under "Normal Purchases and Normal Sales" Scope [Member]      
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]      
Assets $ 200,000    
Liabilities $ 100,000 $ 300,000