MAJOR CUSTOMERS - Additional Information (Details) - Power Industry Services [Member] - customer	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jan. 31, 2015
Product Concentration Risk [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of consolidated net revenues accounted by major customers or segments	96.00%	98.00%	96.00%	98.00%
Customer Concentration Risk [Member] | Revenue [Member]
Concentration Risk [Line Items]
Number of major power industry service customers	2	3	2	3
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Number of major power industry service customers			2		2
Customer Concentration Risk [Member] | Major Customer One [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of consolidated net revenues accounted by major customers or segments	46.00%	51.00%	46.00%	47.00%
Customer Concentration Risk [Member] | Major Customer One [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of consolidated accounts receivable accounted by major customer			42.00%		50.00%
Customer Concentration Risk [Member] | Major Customer Two [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of consolidated net revenues accounted by major customers or segments	44.00%	33.00%	45.00%	34.00%
Customer Concentration Risk [Member] | Major Customer Two [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of consolidated accounts receivable accounted by major customer			41.00%		45.00%
Customer Concentration Risk [Member] | Major Customer Three [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of consolidated net revenues accounted by major customers or segments		14.00%		17.00%