Goodwill and Other Intangible Assets - Schedule of Net Carrying Amount (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2019	Jan. 31, 2019
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
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	19,775	19,477
Accumulated Amortization	(9,866)	(8,982)
Net Carrying Amount	$ 9,909	10,495
Proprietary rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 6 months
Gross Carrying Amount	$ 9,295	9,303
Accumulated Amortization	(4,611)	(4,292)
Net Carrying Amount	$ 4,684	5,011
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	2 years 3 months 1 day
Gross Carrying Amount	$ 5,024	5,024
Accumulated Amortization	(3,489)	(3,147)
Net Carrying Amount	$ 1,535	1,877
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	5 years
Gross Carrying Amount	$ 2,440	2,441
Accumulated Amortization	(1,152)	(1,028)
Net Carrying Amount	$ 1,288	1,413
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	6 years 10 months
Gross Carrying Amount	$ 894	894
Accumulated Amortization	(58)	(52)
Net Carrying Amount	$ 836	842
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	6 years 5 months 2 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(512)	(441)
Net Carrying Amount	$ 918	989
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	4 years 8 months 2 days
Gross Carrying Amount	$ 692	385
Accumulated Amortization	(44)	(22)
Net Carrying Amount	$ 648	$ 363