CUSTOMER CONCENTRATIONS (Details) - customer	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Customer Concentrations
Number of customers			2		3
Customer Concentration Risk [Member] | Contract Asset
Customer Concentrations
Number of customers			1		2
Customer Concentration Risk [Member] | Major Customer One [Member] | Accounts Receivable [Member]
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer			17.00%		22.00%
Customer Concentration Risk [Member] | Major Customer One [Member] | Contract Asset
Customer Concentrations
Percentage of major customers or segments			14.00%		31.00%
Customer Concentration Risk [Member] | Major Customer Two [Member] | Accounts Receivable [Member]
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer			10.00%		15.00%
Customer Concentration Risk [Member] | Major Customer Two [Member] | Contract Asset
Customer Concentrations
Percentage of major customers or segments					13.00%
Customer Concentration Risk [Member] | Major Customer Three [Member] | Accounts Receivable [Member]
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer					12.00%
Power Industry Services [Member] | Product Concentration Risk [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments	77.00%	74.00%	76.00%	76.00%
Power Industry Services [Member] | Customer Concentration Risk [Member] | Revenue [Member]
Customer Concentrations
Number of customers	2	1	1	1
Power Industry Services [Member] | Customer Concentration Risk [Member] | Major Customer One [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments	47.00%	59.00%	47.00%	63.00%
Power Industry Services [Member] | Customer Concentration Risk [Member] | Major Customer Two [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments	10.00%
Industry services | Product Concentration Risk [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments	20.00%	23.00%	21.00%	22.00%
Industry services | Customer Concentration Risk [Member] | Revenue [Member]
Customer Concentrations
Number of customers		1		1
Industry services | Customer Concentration Risk [Member] | Major Customer One [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments		12.00%		12.00%