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PURCHASED INTANGIBLE ASSETS - Goodwill and Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Jan. 31, 2021
Indefinite-Lived Intangible Assets |  |  |
Goodwill | $ 27,943 | $ 27,943 | $ 27,943
Intangible Assets - Gross Carrying Amount | 10,955 |  |
Accumulated Amortization | 7,086 |  |
Intangible Assets, Net (Excluding Goodwill) | 3,869 |  | 4,097
Amortization of intangibles | 228 | $ 225 |
TRC |  |  |
Indefinite-Lived Intangible Assets |  |  |
Goodwill | 9,500 |  | 9,500
GPS |  |  |
Indefinite-Lived Intangible Assets |  |  |
Goodwill | $ 18,500 |  | 18,500
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 | 1,625 |  |
Finite Lived Intangible Assets - Net Amount | $ 2,874 |  | 2,949
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 | 3,497 |  |
Finite Lived Intangible Assets - Net Amount | $ 146 |  | 208
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 | 1,468 |  |
Finite Lived Intangible Assets - Net Amount | $ 429 |  | 497
Customer relationships |  |  |
Indefinite-Lived Intangible Assets |  |  |
Finite-Lived Intangible Assets - Estimated Useful Life | 10 years |  |
Finite Lived Intangible Assets - Gross Carrying Amount | $ 916 |  |
Accumulated Amortization | 496 |  |
Finite Lived Intangible Assets - Net Amount | $ 420 |  | $ 443

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