Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2016	Jan. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 3,997	$ 4,155	$ 2,500
Gross Carrying Amount	14,506	14,517
Accumulated Amortization	(5,064)	(4,051)
Net Carrying Amount	$ 9,442	10,466
Proprietary Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 2 months 12 days
Gross Carrying Amount	$ 5,803	5,959
Accumulated Amortization	(2,865)	(2,645)
Net Carrying Amount	$ 2,938	3,314
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 1 month 6 days
Gross Carrying Amount	$ 4,738	4,633
Accumulated Amortization	(1,516)	(1,006)
Net Carrying Amount	$ 3,222	3,627
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 1 month 6 days
Gross Carrying Amount	$ 1,629	1,592
Accumulated Amortization	(523)	(369)
Net Carrying Amount	$ 1,106	1,223
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	9 years 7 months 6 days
Gross Carrying Amount	$ 886	883
Accumulated Amortization	(24)	(17)
Net Carrying Amount	$ 862	866
Customer Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	2 months 12 days
Gross Carrying Amount	$ 20	20
Accumulated Amortization	(17)	(2)
Net Carrying Amount	$ 3	18
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	9 years 2 months 12 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(119)	(12)
Net Carrying Amount	$ 1,311	$ 1,418