Goodwill and Other Intangible Assets - Schedule of Net Carrying Amount (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 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	19,560	19,477
Accumulated Amortization	(9,420)	(8,982)
Net Carrying Amount	$ 10,140	10,495
Proprietary rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	8 years
Gross Carrying Amount	$ 9,296	9,303
Accumulated Amortization	(4,447)	(4,292)
Net Carrying Amount	$ 4,849	5,011
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	2 years 7 months 1 day
Gross Carrying Amount	$ 5,024	5,024
Accumulated Amortization	(3,318)	(3,147)
Net Carrying Amount	$ 1,706	1,877
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	5 years 2 months 24 days
Gross Carrying Amount	$ 2,440	2,441
Accumulated Amortization	(1,090)	(1,028)
Net Carrying Amount	$ 1,350	1,413
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 1 month 18 days
Gross Carrying Amount	$ 894	894
Accumulated Amortization	(55)	(52)
Net Carrying Amount	$ 839	842
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	6 years 8 months 2 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(477)	(441)
Net Carrying Amount	$ 953	989
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	4 years 8 months 2 days
Gross Carrying Amount	$ 476	385
Accumulated Amortization	(33)	(22)
Net Carrying Amount	$ 443	$ 363