Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 31, 2013	Oct. 31, 2013	Jan. 31, 2013
Network Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Average useful life of assets		3 years
Server Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Net book value of assets			$ 2,755
Change in estimate on depreciation expense	$ 142	$ 325
Change in estimate on earning per share	$ 0.01	$ 0.02
Reevaluation [Member] | Network Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Average useful life of assets		5 years