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Related-Party Transactions (Details) - USD ($)	3 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Jan. 31, 2021
Related-Party Transactions (Details) [Line Items]
Accounts Payable, Related Parties, Current	$ 1,300,000		$ 700,000
One Earth Energy And Nu Gen Energy [Member]
Related-Party Transactions (Details) [Line Items]
Costs and Expenses, Related Party	16,700,000	$ 12,300,000
Accounts Payable, Related Parties, Current	1,300,000		700,000
Refined Coal [Member]
Related-Party Transactions (Details) [Line Items]
Costs and Expenses, Related Party	36,000	$ (297,000)
Accrued Liabilities for Commissions, Expense and Taxes	$ 100,000		$ 100,000

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The carrying amount for commissions, taxes and other expenses that were incurred but unpaid as of the balance sheet date.

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