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Supplemental Statements of Cash Flows Information (Tables)
12 Months Ended
Jan. 31, 2018
Supplemental Cash Flow Elements [Abstract]  
Supplemental Disclosures of Cash Flows Information
Supplemental disclosures of cash flows information for the fiscal years ended January 31, 2018, 2017 and 2016 were as follows (in thousands):
 
Years Ended January 31,
 
2018
 
2017
 
2016
Interest paid
$
86

 
$
673

 
$
694

Income taxes paid, net
494

 
409

 
1,520

Seismic equipment purchases included in accounts payable at year-end
53

 
130

 
325