Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Operating Leases Future Minimum Payment Due [Line Items]
Rent expense	$ 2,500,000	$ 1,500,000	$ 1,000,000
Minimum fee commitment obligation accrued	2,117,000	3,340,000
Value-Added Reseller Agreement [Member]
Operating Leases Future Minimum Payment Due [Line Items]
Minimum fee commitment obligation accrued		1,600,000
Prior to September 2, 2015 [Member] \| Value-Added Reseller Agreement [Member]
Operating Leases Future Minimum Payment Due [Line Items]
Minimum fee commitment obligation		$ 15,900,000