Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Gross Carrying Amount	$ 7,060	$ 7,060
Goodwill Impairment	(4,529)	(4,529)
Goodwill, Net Carrying Amount	2,531	2,531	$ 3,997
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	19,477	15,259
Accumulated Amortization	(8,982)	(7,244)
Net Carrying Amount	$ 10,495	8,015	$ 9,012
Proprietary rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	8 years 4 months 9 days
Gross Carrying Amount	$ 9,303	6,181
Accumulated Amortization	(4,292)	(3,663)
Net Carrying Amount	$ 5,011	2,518
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	2 years 9 months 16 days
Gross Carrying Amount	$ 5,024	5,024
Accumulated Amortization	(3,147)	(2,464)
Net Carrying Amount	$ 1,877	2,560
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	5 years 6 months
Gross Carrying Amount	$ 2,441	1,730
Accumulated Amortization	(1,028)	(778)
Net Carrying Amount	$ 1,413	952
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 3 months 16 days
Gross Carrying Amount	$ 894	894
Accumulated Amortization	(52)	(41)
Net Carrying Amount	$ 842	853
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	6 years 10 months 16 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(441)	(298)
Net Carrying Amount	$ 989	1,132
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	4 years 8 months
Gross Carrying Amount	$ 385	0
Accumulated Amortization	(22)	0
Net Carrying Amount	$ 363	$ 0