Goodwill and Other Intangible Assets - Schedule of Net Carrying Amount (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2018	Jan. 31, 2018
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	19,383	15,259
Accumulated Amortization	(8,472)	(7,244)
Net Carrying Amount	$ 10,911	8,015
Proprietary rights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 7 months 5 days
Gross Carrying Amount	$ 9,594	6,181
Accumulated Amortization	(4,077)	(3,663)
Net Carrying Amount	$ 5,517	2,518
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	3 years 1 month 1 day
Gross Carrying Amount	$ 5,024	5,024
Accumulated Amortization	(2,976)	(2,464)
Net Carrying Amount	$ 2,048	2,560
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	5 years 8 months 24 days
Gross Carrying Amount	$ 2,441	1,730
Accumulated Amortization	(965)	(778)
Net Carrying Amount	$ 1,476	952
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 7 months 18 days
Gross Carrying Amount	$ 894	894
Accumulated Amortization	(49)	(41)
Net Carrying Amount	$ 845	853
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life	7 years 2 months 2 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(405)	(298)
Net Carrying Amount	$ 1,025	$ 1,132