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
Jul. 31, 2013
Jan. 31, 2013
Inventory Disclosure [Abstract]    
Components and assemblies $ 3,092 $ 3,472
Finished products 4,854 3,900
Total inventory $ 7,946 $ 7,372