XML 46 R31.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Supplemental Statements of Cash Flows Information (Tables) | 12 Months Ended
--- | ---
Jan. 31, 2017
Supplemental Cash Flow Elements [Abstract] |
Supplemental Disclosures of Cash Flows Information | Supplemental disclosures of cash flows information for the fiscal years ended January 31, 2017, 2016 and 2015 were as follows (in thousands):
|  | Years Ended January 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Interest paid |  | $ | 673 |  |  | $ | 694 |  |  | $ | 860 |
Income taxes paid, net |  |  | 409 |  |  |  | 1,520 |  |  |  | 268 |
Seismic equipment purchases included in accounts payable at year-end |  |  | 130 |  |  |  | 325 |  |  |  | 72 |

X
- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowElementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration