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Property and Equipment (Tables)
 3 Months Ended
Apr. 30, 2016
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block] The components of property and equipment are as follows for the periods presented (amounts in thousands):

    April 30,
2016		     January 31,
2016		  
                 
Land and improvements   $ 21,598     $ 21,598  
Buildings and improvements     24,543       24,543  
Machinery, equipment and fixtures     240,893       237,735  
Construction in progress     6,936       6,094  
      293,970       289,970  
Less: accumulated depreciation     (104,761 )     (99,994 )
Total   $ 189,209     $ 189,976