CONCENTRATIONS OF REVENUES AND ACCOUNTS RECEIVABLE (Details) - customer		3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2017	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Jan. 31, 2017
Accounts Receivable
Major Customers
Number of major power industry service customers	4			4
Major Customer One | Accounts Receivable
Major Customers
Percentage of consolidated accounts receivable accounted by major customer				22.00%		18.00%
Major Customer Two | Accounts Receivable
Major Customers
Percentage of consolidated accounts receivable accounted by major customer				22.00%		17.00%
Major Customer Three | Accounts Receivable
Major Customers
Percentage of consolidated accounts receivable accounted by major customer				16.00%		17.00%
Major Customer Four | Accounts Receivable
Major Customers
Percentage of consolidated accounts receivable accounted by major customer				15.00%		11.00%
Power Services | Revenue
Major Customers
Percentage of major customers or segments		91.00%	86.00%	92.00%	86.00%
Number of major power industry service customers		3	4	4	5
Power Services | Major Customer One | Revenue
Major Customers
Percentage of major customers or segments		36.00%	21.00%	29.00%	17.00%
Power Services | Major Customer Two | Revenue
Major Customers
Percentage of major customers or segments		24.00%	19.00%	27.00%	16.00%
Power Services | Major Customer Three | Revenue
Major Customers
Percentage of major customers or segments		13.00%	18.00%	16.00%	16.00%
Power Services | Major Customer Four | Revenue
Major Customers
Percentage of major customers or segments			15.00%	14.00%	14.00%
Power Services | Major Customer Five | Revenue
Major Customers
Percentage of major customers or segments					14.00%