CUSTOMER CONCENTRATIONS (Details)		3 Months Ended		9 Months Ended
	Jan. 31, 2019 customer	Oct. 31, 2019 customer	Oct. 31, 2018 customer	Oct. 31, 2019 customer	Oct. 31, 2018
Accounts Receivable
Customer Concentrations
Number of customers	2			2
Major Customer One | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer	25.00%			21.00%
Major Customer Two | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer	15.00%			14.00%
Power Services | Revenue
Customer Concentrations
Percentage of major customers or segments		61.00%	76.00%	49.00%	80.00%
Number of customers		2	4	2	4
Power Services | Major Customer One | Revenue
Customer Concentrations
Percentage of major customers or segments		27.00%	20.00%	13.00%	18.00%
Power Services | Major Customer Two | Revenue
Customer Concentrations
Percentage of major customers or segments		17.00%	17.00%	10.00%	16.00%
Power Services | Major Customer Three | Revenue
Customer Concentrations
Percentage of major customers or segments			13.00%		12.00%
Power Services | Major Customer Four | Revenue
Customer Concentrations
Percentage of major customers or segments			12.00%		11.00%
Industry services | Revenue
Customer Concentrations
Percentage of major customers or segments		34.00%	21.00%	47.00%	17.00%
Number of customers		1
Industry services | Major Customer One | Revenue
Customer Concentrations
Percentage of major customers or segments		10.00%