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CONCENTRATIONS OF REVENUES AND ACCOUNTS RECEIVABLE (Details) - Customer Concentration Risk - customer | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Accounts Receivable |  |  |
Major Customers |  |  |
Number of major power industry service customers | 4 | 2 |
Major Customer One | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 18.00% |  |
Major Customer One | Accounts Receivable |  |  |
Major Customers |  |  |
Percentage of major customers or segments |  | 27.00% |
Major Customer Two | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 17.00% |  |
Major Customer Two | Accounts Receivable |  |  |
Major Customers |  |  |
Percentage of major customers or segments |  | 27.00% |
Major Customer Three | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 17.00% |  |
Major Customer Four | Accounts Receivable |  |  |
Major Customers |  |  |
Percentage of consolidated accounts receivable accounted by major customer | 11.00% |  |
Power industry services | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 87.00% | 94.00% | 98.00%
Number of major power industry service customers | 5 | 2 | 3
Power industry services | Major Customer One | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 20.00% | 38.00% | 45.00%
Power industry services | Major Customer Two | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 18.00% | 35.00% | 41.00%
Power industry services | Major Customer Three | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 17.00% |  | 12.00%
Power industry services | Major Customer Four | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 14.00% |  |
Power industry services | Major Customer Five | Revenue |  |  |
Major Customers |  |  |
Percentage of major customers or segments | 10.00% |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 + Details
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