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PURCHASED INTANGIBLE ASSETS - Goodwill and Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2016 | Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Finite-Lived Intangible Assets |  |  |  |
Goodwill |  | $ 34,913 | $ 37,405 | $ 18,476
Goodwill allocated for income tax reporting purposes |  | 14,400 |  |
Percentage of contract backlog suspended | 90.00% |  |  |
Impairment loss |  | $ 1,979 |  |
Period of amortization of goodwill for income tax purpose |  | 15 years |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 11,854 |  |
Accumulated Amortization |  | 3,673 | 2,510 | 1,979
Finite Lived Intangible Assets - Net Amount |  | 8,000 |  |
Intangible assets, net |  | 8,181 | 9,344 |
APC |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Impairment loss |  | 2,000 | 0 | $ 0
GPS |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Goodwill |  | 18,500 |  |
TRC |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Goodwill |  | 14,400 |  |
APC |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Goodwill |  | $ 2,000 |  |
Trade names | GPS |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 15 years |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 3,643 |  |
Accumulated Amortization |  | 2,464 |  |
Finite Lived Intangible Assets - Net Amount |  | 1,179 | 1,421 |
Trade names | TRC |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | 4,499 |  |
Accumulated Amortization |  | 350 |  |
Finite Lived Intangible Assets - Net Amount |  | $ 4,149 | 4,499 |
Process certifications | TRC |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 7 years |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 1,897 |  |
Accumulated Amortization |  | 316 |  |
Finite Lived Intangible Assets - Net Amount |  | $ 1,581 | 1,852 |
Customer relationships | TRC |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 10 years |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 916 |  |
Accumulated Amortization |  | 107 |  |
Finite Lived Intangible Assets - Net Amount |  | $ 809 | 901 |
Customer relationships | APC |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 4 years |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 430 |  |
Accumulated Amortization |  | 167 |  |
Finite Lived Intangible Assets - Net Amount |  | 263 | 371 |
Other intangibles |  |  |  |
Finite-Lived Intangible Assets |  |  |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | 288 |  |
Accumulated Amortization |  | 269 |  |
Finite Lived Intangible Assets - Net Amount |  | $ 19 | $ 119 |

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