Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2017	Jan. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 3,997	$ 3,997
Gross Carrying Amount	14,790	14,411
Accumulated Amortization	(6,639)	(5,399)
Net Carrying Amount	$ 8,151	9,012
Proprietary Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 1 month 20 days
Gross Carrying Amount	$ 5,973	5,810
Accumulated Amortization	(3,430)	(3,003)
Net Carrying Amount	$ 2,543	2,807
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	4 years 1 month 20 days
Gross Carrying Amount	$ 4,835	4,679
Accumulated Amortization	(2,206)	(1,656)
Net Carrying Amount	$ 2,629	3,023
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 2 months
Gross Carrying Amount	$ 1,663	1,608
Accumulated Amortization	(705)	(558)
Net Carrying Amount	$ 958	1,050
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	8 years 6 months 20 days
Gross Carrying Amount	$ 889	884
Accumulated Amortization	(36)	(27)
Net Carrying Amount	$ 853	857
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	8 years 2 months
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(262)	(155)
Net Carrying Amount	$ 1,168	$ 1,275