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Inventories (Details) (USD $)
Jul. 28, 2012
Jan. 31, 2012
Components of inventories    
Materials and Supplies $ 8,708,767 $ 9,204,853
Work-In-Process 1,247,758 1,274,397
Finished Goods 3,989,529 3,649,349
Inventory Gross $ 13,946,054 $ 14,128,599