CONCENTRATIONS OF REVENUES AND ACCOUNTS RECEIVABLE (Details) - Customer Concentration Risk - customer	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Accounts Receivable
Major Customers
Number of major power industry service customers	4	2
Major Customer One | Revenue
Major Customers
Percentage of major customers or segments	18.00%
Major Customer One | Accounts Receivable
Major Customers
Percentage of major customers or segments		27.00%
Major Customer Two | Revenue
Major Customers
Percentage of major customers or segments	17.00%
Major Customer Two | Accounts Receivable
Major Customers
Percentage of major customers or segments		27.00%
Major Customer Three | Revenue
Major Customers
Percentage of major customers or segments	17.00%
Major Customer Four | Accounts Receivable
Major Customers
Percentage of consolidated accounts receivable accounted by major customer	11.00%
Power industry services | Revenue
Major Customers
Percentage of major customers or segments	87.00%	94.00%	98.00%
Number of major power industry service customers	5	2	3
Power industry services | Major Customer One | Revenue
Major Customers
Percentage of major customers or segments	20.00%	38.00%	45.00%
Power industry services | Major Customer Two | Revenue
Major Customers
Percentage of major customers or segments	18.00%	35.00%	41.00%
Power industry services | Major Customer Three | Revenue
Major Customers
Percentage of major customers or segments	17.00%		12.00%
Power industry services | Major Customer Four | Revenue
Major Customers
Percentage of major customers or segments	14.00%
Power industry services | Major Customer Five | Revenue
Major Customers
Percentage of major customers or segments	10.00%