Acquisition of AdvantageMS - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended			0 Months Ended			12 Months Ended
	Jun. 20, 2013	Jan. 31, 2014	Jan. 31, 2014 Minimum [Member]	Jan. 31, 2014 Maximum [Member]	Apr. 25, 2013 Technology [Member]	Jan. 31, 2014 Technology [Member]	Jun. 20, 2013 Advantage Management Solutions, Inc. [Member]	Jan. 31, 2014 Advantage Management Solutions, Inc. [Member] Minimum [Member]	Jan. 31, 2014 Advantage Management Solutions, Inc. [Member] Maximum [Member]	Jun. 20, 2013 Advantage Management Solutions, Inc. [Member] In-process research and development [Member]
Loans At Acquisition Date [Line Items]
Business acquisition date		Jun. 20, 2013
Closing cash consideration for purchase	$ 10,500,000
Percentage of closing consideration	15.00%
Net working capital adjustment	1,900,000
Contingent cash payments		0
Business acquisition-related transaction costs		300,000
Intangible assets	7,380,000									0
Estimated useful life of intangible assets			2 years 3 months 18 days	5 years 4 months 24 days				3 years	6 years
Goodwill	4,850,000	4,850,000					4,900,000
Carrying value of intangible assets						100,000
Intangible assets acquired		$ 0			$ 200,000