Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	0 Months Ended
Apr. 30, 2014	Apr. 30, 2013	Mar. 03, 2014 Value-Added Reseller Agreement [Member]	Apr. 30, 2014 Prior to September 1, 2025 [Member] Value-Added Reseller Agreement [Member]
Other Commitments [Line Items]
Rent expense	$ 0.7	$ 0.5
Minimum fee commitment obligation				$ 496.7
Agreement extension period			10 years

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration