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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% |

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