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Commitments and Contingencies (Details) lb in Millions, gal in Millions, bu in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2021 USD ($)	Apr. 30, 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 \| bu		20.3
Quantity Of Natural Gas Under Sales Commitment \| MMBTU		732,000
Quantity of Ethanol under Sales Commitment \| gal		15.8
Quantity of Distillers Grains Under Sales Commitment \| T		86,000
Quantity of Non-food Grade Corn Oil Under Sales Commitments \| lb		14.5
Refined Coal [Member]
Commitments and Contingencies (Details) [Line Items]
Fees Incurred By Subsidiary \| $	$ 0.9