Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Contingencies And Commitments [Line Items]
Restricted cash	$ 525
Rent expense	2,823	2,720	2,481
Sub-rental income	324	318	318
Sub-rental lease agreement expire	Mar. 31, 2016
Purchase obligations on 2015	2,087
Purchase obligations on 2016	2,060
Purchase obligations on 2017	1,142
Purchase obligations on 2018	600
Royalties expenses already paid	200
Contingent liability	0
Recorded liabilities for guarantees and indemnities	0	0
Corporate Headquarters [Member]
Contingencies And Commitments [Line Items]
Operating lease cover area maturity period	8 years
Letter of credit	525
Restricted cash	525	525
Corporate Headquarters [Member] | Operating Leases [Member]
Contingencies And Commitments [Line Items]
Operating lease cover area expiring	2016
Maximum [Member]
Contingencies And Commitments [Line Items]
Certain office facility operating lease expiring	2016-06
Royalties due	2,600
Maximum [Member] | Corporate Headquarters [Member]
Contingencies And Commitments [Line Items]
Operating lease covers Area	65,941
Maximum [Member] | Other Locations [Member]
Contingencies And Commitments [Line Items]
Certain office facility operating lease expiring	2021-04
Minimum [Member]
Contingencies And Commitments [Line Items]
Royalties due	$ 0