PURCHASED INTANGIBLE ASSETS - Components of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Amounts	$ 7,426	$ 11,050
Accumulated Amortization	4,817	7,728
Net Amounts	$ 2,609	3,322
Trade Name
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	15 years
Gross Amounts	$ 4,499	8,142
Accumulated Amortization	2,150	5,492
Net Amounts	$ 2,349	2,650
Process certifications
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	7 years
Gross Amounts	$ 1,897	1,897
Accumulated Amortization	$ 1,897	1,671
Net Amounts		226
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	10 years
Gross Amounts	$ 916	916
Accumulated Amortization	656	565
Net Amounts	$ 260	351
Customer Contracts
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	1 year
Gross Amounts	$ 114	95
Accumulated Amortization	$ 114
Net Amounts		$ 95