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Contractual Obligations - Summary of Contractual Obligations (Detail) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2014
Commitments And Contingencies Disclosure [Abstract]  
Purchase Commitments, Total $ 12,134
Purchase Commitments, 2015 11,027
Purchase Commitments, 2016 909
Purchase Commitments, 2017 198
Purchase Commitments, 2018   
Purchase Commitments, 2019 and Thereafter   
Operating Lease Obligations, Total 607
Operating Lease Obligations, 2015 311
Operating Lease Obligations, 2016 164
Operating Lease Obligations, 2017 80
Operating Lease Obligations, 2018 52
Operating Lease Obligations, 2019 and Thereafter   
Contractual Obligation, Total 12,741
Contractual Obligation, 2015 11,338
Contractual Obligation, 2016 1,073
Contractual Obligation, 2017 278
Contractual Obligation, 2018 52
Contractual Obligation, 2019 and Thereafter