Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2015	Jan. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 5,579	$ 5,594
Gross Carrying Amount	15,232	15,261
Accumulated Amortization	(5,257)	(4,430)
Net Carrying Amount	$ 9,975	10,831
Proprietary Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	7 years 3 months 18 days
Gross Carrying Amount	$ 6,232	6,121
Accumulated Amortization	(2,520)	(2,240)
Net Carrying Amount	$ 3,712	3,881
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 3 months 18 days
Gross Carrying Amount	$ 6,512	6,613
Accumulated Amortization	(1,978)	(1,583)
Net Carrying Amount	$ 4,534	5,030
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 1 month 6 days
Gross Carrying Amount	$ 2,209	2,243
Accumulated Amortization	(644)	(505)
Net Carrying Amount	$ 1,565	1,738
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 4 months 24 days
Gross Carrying Amount	$ 279	284
Accumulated Amortization	(115)	(102)
Net Carrying Amount	$ 164	$ 182