Commitments and Contingencies (Details) lb in Millions, gal in Millions, bu in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Oct. 31, 2021 USD ($)	Oct. 31, 2021 USD ($)	Oct. 31, 2022 MMBTU 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 (in US Bushels) | bu			9.2
Quantity Of Natural Gas Under Sales Commitment (in Millions of British Thermal Units) | MMBTU			613,000
Quantity of Ethanol under Sales Commitment (in US Gallons) | gal			46.1
Quantity of Distillers Grains Under Sales Commitment (in US Tons) | T			88,000
Quantity of Non-food Grade Corn Oil Under Sales Commitments (in Pounds) | lb			12.3
Refined Coal [Member]
Commitments and Contingencies (Details) [Line Items]
Fees Incurred By Subsidiary | $	$ 2.0	$ 5.1