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SEGMENT REPORTING (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2017 USD ($) | Oct. 31, 2016 USD ($) | Jul. 31, 2016 USD ($) | Apr. 30, 2016 USD ($) | Jan. 31, 2016 USD ($) | Oct. 31, 2015 USD ($) | Jul. 31, 2015 USD ($) | Apr. 30, 2015 USD ($) | Jan. 31, 2017 USD ($) item | Jan. 31, 2016 USD ($) | Jan. 31, 2015 USD ($)
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Operating segment | item |  |  |  |  |  |  |  |  | 1 |  |
Revenues | $ 206,760 | $ 175,444 | $ 162,495 | $ 130,348 | $ 116,386 | $ 113,967 | $ 97,434 | $ 85,488 | $ 675,047 | $ 413,275 | $ 383,110
Cost of revenues |  |  |  |  |  |  |  |  | 528,336 | 313,810 | 299,507
Gross profit | 37,819 | 36,578 | 44,012 | 28,302 | 23,543 | 26,262 | 28,493 | 21,167 | 146,711 | 99,465 | 83,603
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 32,478 | 25,060 | 19,470
Impairment loss |  |  |  |  |  |  |  |  | 1,979 |  |
Income (loss) from operations | 29,770 | 26,730 | 34,499 | 21,255 | 14,461 | 20,672 | 23,645 | 15,627 | 112,254 | 74,405 | 64,133
Other income, net |  |  |  |  |  |  |  |  | 2,278 | 1,101 | 234
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 114,532 | 75,506 | 64,367
Income tax expense |  |  |  |  |  |  |  |  | 37,106 | 25,302 | 20,912
Net income | 20,781 | $ 19,226 | $ 23,299 | $ 14,120 | 9,160 | $ 14,359 | $ 15,834 | $ 10,851 | 77,426 | 50,204 | 43,455
Amortization expense |  |  |  |  |  |  |  |  | 1,163 | 531 | 243
Depreciation |  |  |  |  |  |  |  |  | 2,043 | 779 | 551
Property, plant and equipment additions |  |  |  |  |  |  |  |  | 2,811 | 3,118 | 2,936
Current assets | 587,949 |  |  |  | 350,612 |  |  |  | 587,949 | 350,612 |
Current liabilities | 350,724 |  |  |  | 187,712 |  |  |  | 350,724 | 187,712 |
Goodwill | 34,913 |  |  |  | 37,405 |  |  |  | 34,913 | 37,405 | 18,476
Total assets | 644,247 |  |  |  | 409,791 |  |  |  | 644,247 | 409,791 | 391,193
Power industry services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 586,628 | 387,636 | 376,676
Cost of revenues |  |  |  |  |  |  |  |  | 452,599 | 290,823 | 294,643
Gross profit |  |  |  |  |  |  |  |  | 134,029 | 96,813 | 82,033
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 17,588 | 15,303 | 11,930
Impairment loss |  |  |  |  |  |  |  |  | 1,979 |  |
Income (loss) from operations |  |  |  |  |  |  |  |  | 114,462 | 81,510 | 70,103
Other income, net |  |  |  |  |  |  |  |  | 2,145 | 827 | 231
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 116,607 | 82,337 | 70,334
Amortization expense |  |  |  |  |  |  |  |  | 350 | 415 | 243
Depreciation |  |  |  |  |  |  |  |  | 665 | 433 | 372
Property, plant and equipment additions |  |  |  |  |  |  |  |  | 1,005 | 2,985 | 2,807
Current assets | 461,086 |  |  |  |  |  |  |  | 461,086 |  |
Current liabilities | 337,617 |  |  |  |  |  |  |  | 337,617 |  |
Goodwill | 20,548 |  |  |  | 22,525 |  |  |  | 20,548 | 22,525 | 18,476
Total assets | 488,431 |  |  |  | 274,627 |  |  |  | 488,431 | 274,627 | 303,737
Telecommunications infrastructure services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 9,425 | 10,379 | 6,434
Cost of revenues |  |  |  |  |  |  |  |  | 7,383 | 7,460 | 4,864
Gross profit |  |  |  |  |  |  |  |  | 2,042 | 2,919 | 1,570
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 1,430 | 1,323 | 1,299
Income (loss) from operations |  |  |  |  |  |  |  |  | 612 | 1,596 | 271
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 612 | 1,596 | 271
Depreciation |  |  |  |  |  |  |  |  | 201 | 162 | 169
Property, plant and equipment additions |  |  |  |  |  |  |  |  | 563 | 100 | 77
Current assets | 3,399 |  |  |  |  |  |  |  | 3,399 |  |
Current liabilities | 1,012 |  |  |  |  |  |  |  | 1,012 |  |
Total assets | 4,318 |  |  |  | 1,885 |  |  |  | 4,318 | 1,885 | 2,293
Industrial fabrication and field services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 78,994 | 15,260 |
Cost of revenues |  |  |  |  |  |  |  |  | 68,354 | 15,527 |
Gross profit |  |  |  |  |  |  |  |  | 10,640 | (267) |
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 6,264 | 1,151 |
Income (loss) from operations |  |  |  |  |  |  |  |  | 4,376 | (1,418) |
Income (loss) before income taxes |  |  |  |  |  |  |  |  | 4,376 | (1,418) |
Amortization expense |  |  |  |  |  |  |  |  | 813 | 116 |
Depreciation |  |  |  |  |  |  |  |  | 1,165 | 172 |
Property, plant and equipment additions |  |  |  |  |  |  |  |  | 1,238 | 28 |
Current assets | 19,329 |  |  |  |  |  |  |  | 19,329 |  |
Current liabilities | 10,335 |  |  |  |  |  |  |  | 10,335 |  |
Goodwill | 14,365 |  |  |  | 14,880 |  |  |  | 14,365 | 14,880 |
Total assets | 47,316 |  |  |  | 52,436 |  |  |  | 47,316 | 52,436 |
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Selling, general and administrative expenses |  |  |  |  |  |  |  |  | 7,196 | 7,283 | 6,241
Income (loss) from operations |  |  |  |  |  |  |  |  | (7,196) | (7,283) | (6,241)
Other income, net |  |  |  |  |  |  |  |  | 133 | 274 | 3
Income (loss) before income taxes |  |  |  |  |  |  |  |  | (7,063) | (7,009) | (6,238)
Depreciation |  |  |  |  |  |  |  |  | 12 | 12 | 10
Property, plant and equipment additions |  |  |  |  |  |  |  |  | 5 | 5 | 52
Current assets | 104,135 |  |  |  |  |  |  |  | 104,135 |  |
Current liabilities | 1,760 |  |  |  |  |  |  |  | 1,760 |  |
Total assets | $ 104,182 |  |  |  | $ 80,843 |  |  |  | $ 104,182 | $ 80,843 | $ 85,163

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