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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Jan. 31, 2013
Cash flows from operating activities:      
Net (loss) income $ (9,192)us-gaap_NetIncomeLoss $ 4,768us-gaap_NetIncomeLoss $ 17,051us-gaap_NetIncomeLoss
Adjustments to reconcile net (loss) income to net cash provided by operating activities:      
Depreciation and amortization 36,986us-gaap_DepreciationAmortizationAndAccretionNet 31,037us-gaap_DepreciationAmortizationAndAccretionNet 34,939us-gaap_DepreciationAmortizationAndAccretionNet
Stock-based compensation 1,298us-gaap_ShareBasedCompensation 1,143us-gaap_ShareBasedCompensation 1,586us-gaap_ShareBasedCompensation
Provision for (recovery of) doubtful accounts, net of charge offs 2,835mind_ProvisionForDoubtfulAccountsNetOfChargeOffs 1,048mind_ProvisionForDoubtfulAccountsNetOfChargeOffs (636)mind_ProvisionForDoubtfulAccountsNetOfChargeOffs
Provision for inventory obsolescence 8us-gaap_InventoryWriteDown (60)us-gaap_InventoryWriteDown 163us-gaap_InventoryWriteDown
Gross profit from sale of lease pool equipment (2,061)mind_GrossProfitFromSaleOfLeasePoolEquipment (4,556)mind_GrossProfitFromSaleOfLeasePoolEquipment (5,369)mind_GrossProfitFromSaleOfLeasePoolEquipment
Excess tax benefit (expense) from exercise of non-qualified stock options and restricted shares   5us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities (420)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
Deferred tax benefit (3,237)mind_DeferredIncomeTaxExpenseBenefitNetOfOtherTaxes (2,204)mind_DeferredIncomeTaxExpenseBenefitNetOfOtherTaxes (4,450)mind_DeferredIncomeTaxExpenseBenefitNetOfOtherTaxes
Changes in non-current income taxes payable   32us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable (5,059)us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Foreign exchange losses net of gains 3,258mind_GainsLossesOnInvestmentAndForeignExchange    
Changes in:      
Trade accounts and contracts receivable 605us-gaap_IncreaseDecreaseInReceivables (9,142)us-gaap_IncreaseDecreaseInReceivables 13,331us-gaap_IncreaseDecreaseInReceivables
Inventories (279)us-gaap_IncreaseDecreaseInInventories (2,836)us-gaap_IncreaseDecreaseInInventories 718us-gaap_IncreaseDecreaseInInventories
Income taxes receivable and payable 1,701us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable 3,215us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable (6,718)us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable
Prepaid foreign income tax     3,519us-gaap_IncreaseDecreaseInIncomeTaxes
Accounts payable, accrued expenses and other current liabilities (2,303)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities 100us-gaap_IncreaseDecreaseInOtherCurrentLiabilities (4,091)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities
Prepaids and other current assets, net (4,414)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (1,335)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (307)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Net cash provided by operating activities 25,205us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 21,215us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 44,257us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows from investing activities:      
Purchases of seismic equipment held for lease (19,449)mind_PaymentsToAcquireSeismicEquipmentHeldForLease (43,509)mind_PaymentsToAcquireSeismicEquipmentHeldForLease (44,694)mind_PaymentsToAcquireSeismicEquipmentHeldForLease
Acquisition of business (14,500)us-gaap_PaymentsToAcquireBusinessesGross    
Purchases of property and equipment (451)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (549)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (965)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Sales of used lease pool equipment 3,158mind_ProceedsFromSaleOfLeasePoolEquipment 6,851mind_ProceedsFromSaleOfLeasePoolEquipment 11,412mind_ProceedsFromSaleOfLeasePoolEquipment
Payment for earn-out provision     (450)us-gaap_OtherPaymentsToAcquireBusinesses
Net cash used in investing activities (31,242)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (37,207)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (34,697)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows from financing activities:      
Net (payments on) proceeds from revolving line of credit (5,000)us-gaap_ProceedsFromRepaymentsOfLinesOfCredit 18,000us-gaap_ProceedsFromRepaymentsOfLinesOfCredit (8,550)us-gaap_ProceedsFromRepaymentsOfLinesOfCredit
Proceeds from equipment notes     147mind_ProceedsFromEquipmentNotes
Payments on borrowings (893)us-gaap_RepaymentsOfOtherDebt (136)us-gaap_RepaymentsOfOtherDebt (1,532)us-gaap_RepaymentsOfOtherDebt
Proceeds from term loan 10,000us-gaap_ProceedsFromRepaymentsOfDebt    
Net (purchases of) proceeds from short-term investment (99)us-gaap_PaymentsForProceedsFromShortTermInvestments 652us-gaap_PaymentsForProceedsFromShortTermInvestments (689)us-gaap_PaymentsForProceedsFromShortTermInvestments
Proceeds from issuance of common stock upon exercise of options 320us-gaap_ProceedsFromStockOptionsExercised 498us-gaap_ProceedsFromStockOptionsExercised 329us-gaap_ProceedsFromStockOptionsExercised
Purchase of treasury stock (9,762)mind_PaymentsForRepurchaseOfRestrictedStockForTreasury (2,200)mind_PaymentsForRepurchaseOfRestrictedStockForTreasury  
Excess tax benefit from exercise of non-qualified stock options   (5)us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 420us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Net cash (used in) provided by financing activities (5,434)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 16,809us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (9,875)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of changes in foreign exchange rates on cash and cash equivalents 1,484us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents (805)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 178us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net (decrease) increase in cash and cash equivalents (9,987)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 12us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (137)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of year 15,162us-gaap_CashAndCashEquivalentsAtCarryingValue 15,150us-gaap_CashAndCashEquivalentsAtCarryingValue 15,287us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of year $ 5,175us-gaap_CashAndCashEquivalentsAtCarryingValue $ 15,162us-gaap_CashAndCashEquivalentsAtCarryingValue $ 15,150us-gaap_CashAndCashEquivalentsAtCarryingValue