CUSTOMER CONCENTRATIONS (Details)		1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2019	Jul. 31, 2019	Jul. 31, 2019 customer	Jul. 31, 2018 customer	Jul. 31, 2019 customer	Jul. 31, 2018
Major Customer One | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer	25.00%	16.00%
Major Customer Two | Revenue
Customer Concentrations
Percentage of major customers or segments			11.00%
Major Customer Two | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer	15.00%
Power Services | Revenue
Customer Concentrations
Percentage of major customers or segments			44.00%	77.00%	43.00%	82.00%
Number of major power industry service customers			1	4	2	3
Power Services | Major Customer One | Revenue
Customer Concentrations
Percentage of major customers or segments			23.00%	18.00%	12.00%	20.00%
Power Services | Major Customer Two | Revenue
Customer Concentrations
Percentage of major customers or segments				16.00%	10.00%	14.00%
Power Services | Major Customer Three | Revenue
Customer Concentrations
Percentage of major customers or segments				11.00%		13.00%
Power Services | Major Customer Four | Revenue
Customer Concentrations
Percentage of major customers or segments				10.00%
Industry services | Revenue
Customer Concentrations
Percentage of major customers or segments			53.00%	21.00%	54.00%	16.00%
Number of major power industry service customers			1