MAJOR CUSTOMERS - Additional Information (Details) - Customer Concentration Risk [Member] - customer	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Revenue [Member]
Concentration Risk [Line Items]
Number of major power industry service customers	2	3	2	3
Accounts Receivable [Member]
Concentration Risk [Line Items]
Number of major power industry service customers			2		2
Major Customer One [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of consolidated net revenues accounted by major customers or segments	36.00%	44.00%	42.00%	45.00%
Major Customer One [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of consolidated accounts receivable accounted by major customer			42.00%		50.00%
Major Customer Two [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of consolidated net revenues accounted by major customers or segments	36.00%	44.00%	41.00%	39.00%
Major Customer Two [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of consolidated accounts receivable accounted by major customer			41.00%		45.00%
Major Customer Three [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of consolidated net revenues accounted by major customers or segments	10.00%	10.00%		14.00%