Commitments and Contingencies (Details) lb in Millions, gal in Millions, bu in Millions, $ in Millions	3 Months Ended
Apr. 30, 2018 USD ($) T lb bu gal
One Earth Energy And Nu Gen Energy [Member]
Commitments and Contingencies (Details) [Line Items]
Quantity of Bushels under Forward Purchase Contract \| bu	23.9
Quantity of Ethanol under Sales Commitment \| gal	43.8
Quantity of Distillers Grains Under Sales Commitment \| T	113,000
Quantity of Non-food Grade Corn Oil Under Sales Commitments \| lb	17.4
Supply Commitment Expected Period Of Delivery	They expect to deliver a majority of the ethanol,distillers grains and non-food grade corn oil through October 2018.
Refined Coal [Member]
Commitments and Contingencies (Details) [Line Items]
Fees Incurred By Subsidiary \| $	$ 1.8

23.9

113,000

They expect to deliver a majority of the ethanol,distillers grains and non-food grade corn oil through October 2018.