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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Cash flows from operating activities:    
Net (loss) income $ (237)us-gaap_NetIncomeLoss $ 3,737us-gaap_NetIncomeLoss
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation and amortization 8,307us-gaap_DepreciationAmortizationAndAccretionNet 9,082us-gaap_DepreciationAmortizationAndAccretionNet
Stock-based compensation 281us-gaap_ShareBasedCompensation 399us-gaap_ShareBasedCompensation
Provision for inventory obsolescence 45us-gaap_InventoryWriteDown 20us-gaap_InventoryWriteDown
Gross profit from sale of lease pool equipment (129)mind_GrossProfitFromSaleOfLeasePoolEquipment (707)mind_GrossProfitFromSaleOfLeasePoolEquipment
Excess tax benefit from exercise of non-qualified stock options and restricted shares (12)us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities  
Deferred tax benefit (347)mind_DeferredIncomeTaxExpenseBenefitNetOfOtherTaxes (801)mind_DeferredIncomeTaxExpenseBenefitNetOfOtherTaxes
Changes in working capital items:    
Accounts receivable (2,839)us-gaap_IncreaseDecreaseInAccountsReceivable 404us-gaap_IncreaseDecreaseInAccountsReceivable
Contracts and notes receivable   64us-gaap_IncreaseDecreaseInNotesReceivables
Inventories (850)us-gaap_IncreaseDecreaseInInventories 175us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets 3,277us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets 1,343us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Income taxes payable (533)us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable 378us-gaap_IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable
Accounts payable, accrued expenses, other current liabilities and deferred revenue 253us-gaap_IncreaseDecreaseInOtherCurrentLiabilities (36)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities
Foreign exchange gains net of losses (778)mind_GainsLossesOnInvestmentAndForeignExchange  
Net cash provided by operating activities 6,438us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 14,058us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows from investing activities:    
Purchases of seismic equipment held for lease (73)mind_PaymentsToAcquireSeismicEquipmentHeldForLease (9,129)mind_PaymentsToAcquireSeismicEquipmentHeldForLease
Purchases of property and equipment (88)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (87)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Sale of used lease pool equipment 227mind_ProceedsFromSaleOfLeasePoolEquipment 1,101mind_ProceedsFromSaleOfLeasePoolEquipment
Net cash provided by (used in) investing activities 66us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (8,115)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows from financing activities:    
Net payments on revolving line of credit (5,000)us-gaap_ProceedsFromRepaymentsOfLinesOfCredit (7,000)us-gaap_ProceedsFromRepaymentsOfLinesOfCredit
Payments on term loan and other borrowings (952)us-gaap_ProceedsFromRepaymentsOfDebt (34)us-gaap_ProceedsFromRepaymentsOfDebt
Net proceeds from short-term investments 184us-gaap_PaymentsForProceedsFromShortTermInvestments 85us-gaap_PaymentsForProceedsFromShortTermInvestments
Proceeds from issuance of common stock upon exercise of options   36us-gaap_ProceedsFromStockOptionsExercised
Purchase of treasury stock   (2,173)mind_PaymentsForRepurchaseOfRestrictedStockForTreasury
Excess tax benefit from exercise of non-qualified stock options and restricted shares 12us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities  
Net cash used in financing activities (5,756)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (9,086)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of changes in foreign exchange rates on cash and cash equivalents 304us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents (338)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net change in cash and cash equivalents 1,052us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (3,481)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period 5,175us-gaap_CashAndCashEquivalentsAtCarryingValue 15,162us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period 6,227us-gaap_CashAndCashEquivalentsAtCarryingValue 11,681us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental cash flow information:    
Interest paid 228us-gaap_InterestPaid 136us-gaap_InterestPaid
Income taxes paid 796us-gaap_IncomeTaxesPaidNet 1,555us-gaap_IncomeTaxesPaidNet
Purchases of seismic equipment held for lease in accounts payable at end of period $ 1,331mind_PurchaseOfSeismicEquipmentHeldForLeaseInAccountsPayable $ 1,361mind_PurchaseOfSeismicEquipmentHeldForLeaseInAccountsPayable