Goodwill and Other Intangible Assets - Schedule of Net Carrying Amount (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2021	Jan. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Gross Carrying Amount	$ 7,060	$ 7,060
Goodwill, Accumulated Impairment	(7,060)	(7,060)
Goodwill, Net Carrying Amount	0	0
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,692	18,253
Accumulated Amortization	(11,477)	(10,743)
Accumulated Impairment	(760)	(760)
Net Carrying Amount	$ 6,455	6,750
Proprietary rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	6 years 4 months 24 days
Gross Carrying Amount	$ 8,220	7,781
Accumulated Amortization	(3,920)	(3,688)
Net Carrying Amount	$ 4,300	4,093
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	4 months 24 days
Gross Carrying Amount	$ 5,024	5,024
Accumulated Amortization	(4,748)	(4,513)
Net Carrying Amount	$ 276	511
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	3 years 1 month 6 days
Gross Carrying Amount	$ 2,440	2,440
Accumulated Amortization	(1,653)	(1,528)
Net Carrying Amount	$ 787	912
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	4 years 9 months 18 days
Gross Carrying Amount	$ 894	894
Accumulated Amortization	(80)	(74)
Accumulated Impairment	(760)	(760)
Net Carrying Amount	$ 54	60
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	4 years 4 months 24 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(798)	(727)
Net Carrying Amount	$ 632	703
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	2 years 9 months 18 days
Gross Carrying Amount	$ 684	684
Accumulated Amortization	(278)	(213)
Net Carrying Amount	$ 406	$ 471