CUSTOMER CONCENTRATIONS (Details) - customer	3 Months Ended		12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Jan. 31, 2022
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Customer Concentrations
Number of customers	3		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	18.00%		22.00%
Customer Concentration Risk [Member] | Major Customer One [Member] | Contract Asset
Customer Concentrations
Percentage of major customers or segments	29.00%		31.00%
Customer Concentration Risk [Member] | Major Customer Two [Member] | Accounts Receivable [Member]
Customer Concentrations
Percentage of consolidated accounts receivable accounted by major customer	13.00%		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	10.00%		12.00%
Power Industry Services [Member] | Product Concentration Risk [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments		77.00%
Power Industry Services [Member] | Product Concentration Risk [Member] | Major Customer One [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments	74.00%
Power Industry Services [Member] | Customer Concentration Risk [Member] | Revenue [Member]
Customer Concentrations
Number of customers	1	1
Power Industry Services [Member] | Customer Concentration Risk [Member] | Major Customer One [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments	48.00%	68.00%
Industry services | Product Concentration Risk [Member] | Revenue [Member]
Customer Concentrations
Percentage of major customers or segments	22.00%	21.00%