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Supplemental Statements of Cash Flows Information (Tables) | 12 Months Ended
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Jan. 31, 2014
Supplemental Cash Flow Elements [Abstract] |
Supplemental Disclosures of Cash Flows Information | Supplemental disclosures of cash flows information for the fiscal years ended January 31, 2014, 2013 and 2012 were as follows (in thousands):
|  | Years Ended January 31, |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Interest paid |  | $ | 342 |  |  | $ | 533 |  |  | $ | 704 |
Income taxes paid, net |  |  | 215 |  |  |  | 9,177 |  |  |  | 7,536 |
Seismic equipment purchases included in accounts payable at year-end |  |  | 7,707 |  |  |  | 4,268 |  |  |  | 9,900 |
Stock issued for accrued compensation |  |  | — |  |  |  | 516 |  |  |  | 303 |

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