Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) (USD $)	9 Months Ended
	Oct. 31, 2014	Jan. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 5,661,000	$ 4,320,000
Gross Carrying Amount	16,185,000	6,563,000
Accumulated Amortization	(4,280,000)	(3,362,000)
Net Carrying Amount	11,905,000	3,201,000
Proprietary Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	8 years 1 month 6 days
Gross Carrying Amount	6,365,000	3,577,000
Accumulated Amortization	(2,177,000)	(1,900,000)
Net Carrying Amount	4,188,000	1,677,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years
Gross Carrying Amount	7,105,000	2,159,000
Accumulated Amortization	(1,520,000)	(1,057,000)
Net Carrying Amount	5,585,000	1,102,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 9 months 18 days
Gross Carrying Amount	2,404,000	650,000
Accumulated Amortization	(476,000)	(318,000)
Net Carrying Amount	1,928,000	332,000
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	7 years
Gross Carrying Amount	311,000	177,000
Accumulated Amortization	(107,000)	(87,000)
Net Carrying Amount	$ 204,000	$ 90,000