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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Income Taxes [Line Items] |  |  |
Recognized deferred tax liability related to undistributed earnings | $ 0 us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings |  |
Unrecognized deferred tax liability related to undistributed earnings | 8,500,000 mind_DeferredTaxLiabilityNotRecognizedUndistributedForeignEarnings |  |
Deferred tax assets | 2,837,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 2,689,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
Decrease in additional paid in capital | 2,600,000 mind_IncreaseDecreaseInAdditionalPaidInCapital |  |
Increase in Income tax expense | 200,000 mind_IncreaseDecreaseInIncomeTaxExpense |  |
Valuation allowance | 1,379,000 us-gaap_DeferredTaxAssetsValuationAllowance |  |
Deferred tax asset | 123,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 5,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |
Associated excess tax benefit |  | (5,000)us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 420,000 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Net reduction in consolidated income tax expenses |  |  | 141,000 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit
Recognized tax benefit |  |  | 3,300,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Reversed estimates of potential penalties and interest |  |  | 1,900,000 mind_PotentialIncomeTaxPenaltiesAndInterestAfterRevision
Unrecognized Tax Benefit | 237,000 mind_UnrecognizedTaxBenefitRelatedToUncertainTaxPosition | 408,000 mind_UnrecognizedTaxBenefitRelatedToUncertainTaxPosition |
Accrued interest and penalties | 145,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued | 154,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued |
Potential penalties and interest | 10,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 222,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | (93,000)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Foreign Country [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax credit carry forwards | $ 4,500,000 us-gaap_TaxCreditCarryforwardAmount / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |
Tax credit carry forwards expiration year | 2025 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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