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Consolidated Condensed Financial Statements (Details)
 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2017
Oct. 31, 2018
Jan. 31, 2017
Consolidated Condensed Financial Statements (Details) [Line Items]      
Number of Consolidated Subsidiaries   4  
Number of Reportable Segments 2 2 1
Ethanol [Member]      
Consolidated Condensed Financial Statements (Details) [Line Items]      
Number of Operating Segments   3  
Ethanol [Member] | Majority-Owned Subsidiary, Unconsolidated [Member]      
Consolidated Condensed Financial Statements (Details) [Line Items]      
Number of Operating Segments   2  
Refined Coal [Member] | Majority-Owned Subsidiary, Unconsolidated [Member]      
Consolidated Condensed Financial Statements (Details) [Line Items]      
Number of Operating Segments   1