PURCHASED INTANGIBLE ASSETS - Goodwill and Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2022	Jan. 31, 2022	Oct. 31, 2021
Indefinite-Lived Intangible Assets
Goodwill	$ 28,033	$ 28,033	$ 27,943
Intangible Assets - Gross Carrying Amount	7,426
Accumulated Amortization	4,696
Intangible Assets, Net (Excluding Goodwill)	2,730	3,322
TRC.
Indefinite-Lived Intangible Assets
Goodwill		9,500
GPS.
Indefinite-Lived Intangible Assets
Goodwill	$ 18,500
Trade Name
Indefinite-Lived Intangible Assets
Finite-Lived Intangible Assets - Estimated Useful Life	15 years
Finite Lived Intangible Assets - Gross Carrying Amount	$ 4,499
Accumulated Amortization	2,075
Finite Lived Intangible Assets - Net Amount	$ 2,424	2,650
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	1,874
Finite Lived Intangible Assets - Net Amount	$ 23	226
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	633
Finite Lived Intangible Assets - Net Amount	283	351
Customer Contracts
Indefinite-Lived Intangible Assets
Intangible Assets - Gross Carrying Amount	114
Accumulated Amortization	$ 114
Finite Lived Intangible Assets - Net Amount		$ 95
Customer Contracts | Maximum
Indefinite-Lived Intangible Assets
Finite-Lived Intangible Assets - Estimated Useful Life	1 year