CUSTOMER CONCENTRATIONS (Details) - customer	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Jan. 31, 2020
Accounts Receivable
Customer Concentrations
Number of customers			4		3
Contract Asset
Customer Concentrations
Number of customers			2		2
Major Customer One | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer			24.00%		24.00%
Major Customer One | Contract Asset
Customer Concentrations
Percentage of major customers or segments			63.00%		51.00%
Major Customer Two | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer			14.00%		21.00%
Major Customer Two | Contract Asset
Customer Concentrations
Percentage of major customers or segments			12.00%		31.00%
Major Customer Three | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer			11.00%		12.00%
Major Customer Four | Accounts Receivable
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer			10.00%
Power Services | Revenue
Customer Concentrations
Percentage of major customers or segments	86.00%	61.00%	83.00%	49.00%
Number of customers	1	2	1	2
Power Services | Major Customer One | Revenue
Customer Concentrations
Percentage of major customers or segments	70.00%	27.00%	69.00%	13.00%
Power Services | Major Customer Two | Revenue
Customer Concentrations
Percentage of major customers or segments		17.00%		10.00%
Industry services | Revenue
Customer Concentrations
Percentage of major customers or segments	12.00%	34.00%	15.00%	47.00%
Number of customers		1
Industry services | Major Customer One | Revenue
Customer Concentrations
Percentage of major customers or segments		10.00%