Goodwill and Other Intangible Assets - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2016	Jan. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 4,155	$ 4,155	$ 2,500
Gross Carrying Amount	14,947	14,517
Accumulated Amortization	(4,864)	(4,051)
Net Carrying Amount	$ 10,083	10,466
Proprietary Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 6 months
Gross Carrying Amount	$ 6,013	5,959
Accumulated Amortization	(2,845)	(2,645)
Net Carrying Amount	$ 3,168	3,314
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 3 months 18 days
Gross Carrying Amount	$ 4,905	4,633
Accumulated Amortization	(1,403)	(1,006)
Net Carrying Amount	$ 3,502	3,627
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	6 years 3 months 18 days
Gross Carrying Amount	$ 1,688	1,592
Accumulated Amortization	(498)	(369)
Net Carrying Amount	$ 1,190	1,223
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	9 years 9 months 18 days
Gross Carrying Amount	$ 891	883
Accumulated Amortization	(23)	(17)
Net Carrying Amount	$ 868	866
Customer Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	4 months 24 days
Gross Carrying Amount	$ 20	20
Accumulated Amortization	(12)	(2)
Net Carrying Amount	$ 8	18
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	9 years 4 months 24 days
Gross Carrying Amount	$ 1,430	1,430
Accumulated Amortization	(83)	(12)
Net Carrying Amount	$ 1,347	$ 1,418