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CUSTOMER CONCENTRATIONS (Tables) | 6 Months Ended
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Jul. 31, 2024
CUSTOMER CONCENTRATIONS |
schedule of the percentage of consolidated revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended July 31, |  | ​ | Six Months Ended July 31, | ​
​ | ​ | 2024 |  | 2023 | ​ | ​ | 2024 |  | 2023 | ​
Power industry services | ​ | ​ | 76.5 | % | ​ | 74.5 | % | ​ | ​ | 73.8 | % | ​ | 71.6 | %
Industrial construction services | ​ |  | 21.9 | ​ |  | 23.2 | ​ | ​ |  | 24.3 | ​ |  | 25.7 | ​
Telecommunications infrastructure services | ​ |  | 1.6 | ​ |  | 2.3 | ​ | ​ |  | 1.9 | ​ |  | 2.7 | ​

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