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Inventories - Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified | May 03, 2014 | Jan. 31, 2014
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Inventory Disclosure [Abstract] |  |
Materials and Supplies | $ 10,257 | $ 10,722
Work-In-Process | 1,657 | 852
Finished Goods | 7,764 | 6,798
Inventory, Gross | 19,678 | 18,372
Inventory Reserve | (3,497) | (3,194)
Balance at May 3 | $ 16,181 | $ 15,178

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