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RELATED PARTIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
RELATED PARTIES (Details) [Line Items]      
Accounts Payable, Related Parties, Current $ 700 $ 1,900  
Proceeds from Contributions from Affiliates 312 524 $ 918
One Earth Energy And Nu Gen Energy [Member]      
RELATED PARTIES (Details) [Line Items]      
Costs and Expenses, Related Party 171,500 176,800 154,500
Refined Coal [Member]      
RELATED PARTIES (Details) [Line Items]      
Costs and Expenses, Related Party (700) 800 $ 1,800
Accrued Liabilities for Commissions, Expense and Taxes 500 1,600  
Proceeds from Contributions from Affiliates $ 300 $ 500