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
Apr. 30, 2014
Jan. 31, 2014
Inventory Disclosure [Abstract]    
Components and assemblies $ 2,290 $ 2,201
Finished products 4,032 4,431
Total inventory $ 6,322 $ 6,632