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