Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2015	Jan. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 5,552	$ 5,594
Gross Carrying Amount	14,990	15,261
Accumulated Amortization	(5,613)	(4,430)
Net Carrying Amount	$ 9,377	10,831
Proprietary Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	7 years 1 month 6 days
Gross Carrying Amount	$ 6,139	6,121
Accumulated Amortization	(2,613)	(2,240)
Net Carrying Amount	$ 3,526	3,881
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 1 month 6 days
Gross Carrying Amount	$ 6,404	6,613
Accumulated Amortization	(2,169)	(1,583)
Net Carrying Amount	$ 4,235	5,030
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 10 months 24 days
Gross Carrying Amount	$ 2,171	2,243
Accumulated Amortization	(710)	(505)
Net Carrying Amount	$ 1,461	1,738
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 1 month 6 days
Gross Carrying Amount	$ 276	284
Accumulated Amortization	(121)	(102)
Net Carrying Amount	$ 155	$ 182