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Concentrations (Details) (USD $) | 12 Months Ended
--- | ---
Jan. 31, 2013 Customers | Jan. 31, 2012 Customers
Concentrations (Textual) [Abstract] |  |
Minimum rate of consolidated accounts receivable | 10.00% | 10.00%
Foreign bank deposits | 15,951,000 |
Credit Risk [Member] |  |
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |
Number of suppliers manufacture land based seismic systems and equipment in use | 3 | 2
Two Major Customer [Member] | Credit Risk [Member] |  |
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |
Aggregate amount of accounts receivable from customers |  | 8,346,000
Three Major Customer [Member] | Credit Risk [Member] |  |
Risks Inherent in Servicing Assets and Servicing Liabilities [Line Items] |  |
Aggregate amount of accounts receivable from customers | 9,591,000 |

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- Details
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- Definition Number of suppliers manufacture land based seismic systems and equipment in use. + References No definition available. + Details
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- Definition The aggregate of all foreign interest-bearing and noninterest-bearing deposit liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(a)) -URI http://asc.fasb.org/extlink&oid=6882215&loc=d3e537907-122884 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Subparagraph a -Article 9 + Details
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