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
Jul. 31, 2015
Jan. 31, 2015
Inventory Disclosure [Abstract]    
Components and assemblies $ 1,424 $ 1,487
Finished products 1,901 1,377
Total inventory $ 3,325 $ 2,864