Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 4,155	$ 5,594	$ 4,320
Gross Carrying Amount	14,517	15,261
Accumulated Amortization	(4,051)	(4,430)
Net Carrying Amount	$ 10,466	10,831	$ 3,201
Proprietary Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 9 months 18 days
Gross Carrying Amount	$ 5,959	6,121
Accumulated Amortization	(2,645)	(2,240)
Net Carrying Amount	$ 3,314	3,881
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	59 months 18 days
Gross Carrying Amount	$ 4,633	6,613
Accumulated Amortization	(1,006)	(1,583)
Net Carrying Amount	$ 3,627	5,030
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 9 months 18 days
Gross Carrying Amount	$ 1,592	2,243
Accumulated Amortization	(369)	(505)
Net Carrying Amount	$ 1,223	1,738
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	10 years 3 months 18 days
Gross Carrying Amount	$ 883	284
Accumulated Amortization	(17)	(102)
Net Carrying Amount	$ 866	$ 182
Customer Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	10 months 24 days
Gross Carrying Amount	$ 20
Accumulated Amortization	(2)
Net Carrying Amount	$ 18
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	9 years 10 months 24 days
Gross Carrying Amount	$ 1,430
Accumulated Amortization	(12)
Net Carrying Amount	$ 1,418