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RELATED PARTIES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
RELATED PARTIES (Details) [Line Items] |  |  |
Accounts Payable, Related Parties, Current | $ 1.7 | $ 1.2 |
One Earth Energy And Nu Gen Energy [Member] |  |  |
RELATED PARTIES (Details) [Line Items] |  |  |
Costs and Expenses, Related Party | $ 148.5 | $ 148.2 | $ 164.7

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