Quarterly report pursuant to Section 13 or 15(d)

Inventories - Schedule of Inventories (Detail)

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Inventories - Schedule of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2013
Jan. 31, 2013
Inventory Disclosure [Abstract]    
Components and assemblies $ 2,291 $ 3,472
Finished products 5,026 3,900
Total inventory $ 7,317 $ 7,372