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Supplemental Statements of Cash Flows Information (Tables)
 12 Months Ended
Jan. 31, 2016
Supplemental Cash Flow Elements [Abstract]  
Supplemental Disclosures of Cash Flows Information

Supplemental disclosures of cash flows information for the fiscal years ended January 31, 2016, 2015 and 2014 were as follows (in thousands):

 

     Years Ended January 31,  
     2016      2015      2014  

Interest paid

    $ 694       $ 860       $ 342   

Income taxes paid, net

      1,520         268         215   

Seismic equipment purchases included in accounts payable at year-end

      325         72         7,707