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Inventories (Tables)
12 Months Ended
Jan. 31, 2013
Inventories [Abstract]  
Components of inventories
                 
    January 31,  
    2013     2012  
(In thousands)            

Materials and Supplies

  $ 6,654     $ 7,147  

Work-in-Progress

    591       1,024  

Finished Goods

    3,934       2,468  
   

 

 

   

 

 

 
    $ 11,179     $ 10,639