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PURCHASED INTANGIBLE ASSETS - Goodwill and Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Nov. 01, 2020 | Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2016 | Jan. 31, 2018
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Goodwill allocated for income tax reporting purposes |  | $ 16,400 |  |  |  |
Period of amortization of goodwill for income tax purpose |  | 15 years |  |  |  |
Goodwill Impairment Loss |  | $ 0 |  |  |  |
Goodwill |  | 27,943 | $ 27,943 | $ 32,838 |  | $ 34,329
Impairment losses |  | 0 | 4,895 | 1,491 |  |
Intangible Assets - Gross Carrying Amount |  | 11,385 |  |  |  |
Accumulated Amortization |  | 7,288 |  |  |  |
Finite Lived Intangible Assets - Net Amount |  | 4,097 | 5,001 |  |  |
Additions to other intangible assets |  | 0 | 0 | 0 |  |
Additions to impairment losses |  | 0 | 0 | 0 |  |
Amortization of intangibles |  | 904 | 1,136 | 1,012 |  |
APC |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Percentage of goodwill acquired |  |  |  |  | 100.00% |
TRC |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Goodwill Impairment Loss |  |  | 2,800 | 1,500 |  |
Percentage of expected annual growth rate | 3.00% |  |  |  |  |
Percentage of profit forecast For Fiscal Year 2022 | 3.10% |  |  |  |  |
Percentage of profit forecast for fiscal year 2026 | 6.80% |  |  |  |  |
Percentage of goodwill acquired |  |  |  |  | 34.00% |
APC |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Goodwill |  |  |  | 2,072 |  | $ 2,072
Impairment losses |  | 0 | 2,072 | $ 0 |  |
TRC |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Excess of the fair value over the carrying value | $ 1,500 |  |  |  |  |
Goodwill |  | $ 9,500 |  |  |  |
Trade names | GPS |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 15 years |  |  |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 3,643 |  |  |  |
Accumulated Amortization |  | 3,435 |  |  |  |
Finite Lived Intangible Assets - Net Amount |  | $ 208 | 450 |  |  |
Trade names | TRC |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 15 years |  |  |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 4,499 |  |  |  |
Accumulated Amortization |  | 1,550 |  |  |  |
Finite Lived Intangible Assets - Net Amount |  | $ 2,949 | 3,249 |  |  |
Process certifications |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 7 years |  |  |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | $ 1,897 |  |  |  |
Accumulated Amortization |  | 1,400 |  |  |  |
Finite Lived Intangible Assets - Net Amount |  | 497 | 768 |  |  |
Customer relationships |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Finite Lived Intangible Assets - Gross Carrying Amount |  | 1,346 |  |  |  |
Accumulated Amortization |  | 903 |  |  |  |
Finite Lived Intangible Assets - Net Amount |  | $ 443 | $ 534 |  |  |
Customer relationships | Maximum |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 10 years |  |  |  |
Customer relationships | Minimum |  |  |  |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life |  | 4 years |  |  |  |

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