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Segment Reporting - Financial Information by Business Segment (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed assets, net | $ 100,087 us-gaap_PropertyPlantAndEquipmentNet |  |  |  | $ 129,573 us-gaap_PropertyPlantAndEquipmentNet |  |  |  | $ 100,087 us-gaap_PropertyPlantAndEquipmentNet | $ 129,573 us-gaap_PropertyPlantAndEquipmentNet | $ 119,608 us-gaap_PropertyPlantAndEquipmentNet
Intangible assets, net | 10,831 us-gaap_FiniteLivedIntangibleAssetsNet |  |  |  | 3,201 us-gaap_FiniteLivedIntangibleAssetsNet |  |  |  | 10,831 us-gaap_FiniteLivedIntangibleAssetsNet | 3,201 us-gaap_FiniteLivedIntangibleAssetsNet | 3,989 us-gaap_FiniteLivedIntangibleAssetsNet
Goodwill | 5,594 us-gaap_Goodwill |  |  |  | 4,320 us-gaap_Goodwill |  |  |  | 5,594 us-gaap_Goodwill | 4,320 us-gaap_Goodwill | 4,320 us-gaap_Goodwill
Total Assets | 179,611 us-gaap_Assets |  |  |  | 205,419 us-gaap_Assets |  |  |  | 179,611 us-gaap_Assets | 205,419 us-gaap_Assets | 190,407 us-gaap_Assets
Revenues | 14,963 us-gaap_Revenues | 22,906 us-gaap_Revenues | 19,545 us-gaap_Revenues | 25,732 us-gaap_Revenues | 23,647 us-gaap_Revenues | 20,275 us-gaap_Revenues | 20,895 us-gaap_Revenues | 27,291 us-gaap_Revenues | 83,146 us-gaap_Revenues | 92,108 us-gaap_Revenues | 104,685 us-gaap_Revenues
Interest income (expense), net |  |  |  |  |  |  |  |  | (673)us-gaap_InterestIncomeExpenseNet | (10)us-gaap_InterestIncomeExpenseNet | 11 us-gaap_InterestIncomeExpenseNet
Income before taxes |  |  |  |  |  |  |  |  | (10,186)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 6,026 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 13,524 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Capital expenditures |  |  |  |  |  |  |  |  | 34,400 mind_AdditionsToCapitalExpenditures | 44,058 mind_AdditionsToCapitalExpenditures | 45,659 mind_AdditionsToCapitalExpenditures
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 36,986 us-gaap_DepreciationAmortizationAndAccretionNet | 31,037 us-gaap_DepreciationAmortizationAndAccretionNet | 34,939 us-gaap_DepreciationAmortizationAndAccretionNet
Equipment Leasing [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed assets, net | 98,964 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember |  |  |  | 128,847 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember |  |  |  | 98,964 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 128,847 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 118,801 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Intangible assets, net | 1,006 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember |  |  |  | 1,529 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember |  |  |  | 1,006 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 1,529 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 2,111 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Total Assets | 148,985 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember |  |  |  | 183,911 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember |  |  |  | 148,985 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 183,911 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 171,971 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Revenues |  |  |  |  |  |  |  |  | 59,830 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 67,022 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 73,516 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Interest income (expense), net |  |  |  |  |  |  |  |  | (549)us-gaap_InterestIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | (12)us-gaap_InterestIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 11 us-gaap_InterestIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Income before taxes |  |  |  |  |  |  |  |  | (12,373)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 1,087 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 2,865 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Capital expenditures |  |  |  |  |  |  |  |  | 15,874 mind_AdditionsToCapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 43,663 mind_AdditionsToCapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 45,181 mind_AdditionsToCapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 35,472 us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 30,353 us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember | 34,320 us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_StatementBusinessSegmentsAxis = mind_EquipmentLeasingMember
Seamap [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fixed assets, net | 1,123 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 726 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 1,123 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 726 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 807 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember
Intangible assets, net | 9,825 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 1,672 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 9,825 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 1,672 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 1,878 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember
Goodwill | 5,594 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 4,320 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 5,594 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 4,320 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 4,320 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember
Total Assets | 30,982 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 21,814 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |  |  |  | 30,982 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 21,814 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 18,578 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember
Revenues |  |  |  |  |  |  |  |  | 23,805 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 25,252 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 32,210 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember
Interest income (expense), net |  |  |  |  |  |  |  |  | (124)us-gaap_InterestIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 2 us-gaap_InterestIncomeExpenseNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember |
Income before taxes |  |  |  |  |  |  |  |  | 2,271 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 4,720 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 10,835 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember
Capital expenditures |  |  |  |  |  |  |  |  | 18,526 mind_AdditionsToCapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 395 mind_AdditionsToCapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | 478 mind_AdditionsToCapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember
Depreciation and amortization expense |  |  |  |  |  |  |  |  | $ 1,514 us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | $ 684 us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember | $ 619 us-gaap_DepreciationAmortizationAndAccretionNet / us-gaap_StatementBusinessSegmentsAxis = mind_SeamapMember

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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