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Accounting Policies and Basis of Presentation (Tables)
 9 Months Ended
Oct. 31, 2013
Schedule of Supplemental Cash Flow Information

The amounts paid for income taxes, interest and noncash investing and financing activities were as follows:

 

     Nine Months  
     Ended October 31,  

(in thousands)

    2013      2012  

Income taxes

    $ 6,854       $ 12,745   

Interest

      2,912         2,073   

Noncash investing and financing activities:

      

Preferred units received in SolmeteX, LLC

      432         —     

Accrued capital additions

      439         1,837   

Deferred convertible notes offering fees

      891         —     

Capital lease obligations for equipment

      —           35