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RELATED PARTIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
RELATED PARTIES (Details) [Line Items]
Accounts Payable, Related Parties, Current	$ 900	$ 1,700
Proceeds from Contributions from Affiliates	918
Refined Coal [Member]
RELATED PARTIES (Details) [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party	1,800
Accrued Liabilities for Commissions, Expense and Taxes	1,500
Proceeds from Contributions from Affiliates	900
One Earth Energy And Nu Gen Energy [Member]
RELATED PARTIES (Details) [Line Items]
Costs and Expenses, Related Party	$ 154,500	$ 148,500	$ 148,200

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Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Costs of sales and operating expenses for the period incurred from transactions with related parties.

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