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Related-Party Transactions (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2021
Oct. 31, 2020
Jan. 31, 2021
Related-Party Transactions (Details) [Line Items]          
Costs and Expenses, Related Party $ 39,000 $ (15,000) $ 230,000 $ (160,000)  
Accounts Payable, Related Parties, Current 1,700   1,700   $ 700
One Earth Energy And Nu Gen Energy [Member]          
Related-Party Transactions (Details) [Line Items]          
Costs and Expenses, Related Party 22,900,000 16,900,000 60,300,000 34,000,000  
Accounts Payable, Related Parties, Current 1,700,000   1,700,000   700,000
Refined Coal [Member]          
Related-Party Transactions (Details) [Line Items]          
Costs and Expenses, Related Party $ 40,000 $ (15,000) $ 200,000 $ (200,000)  
Accrued Liabilities for Commissions, Expense and Taxes         $ 100,000