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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cash flows from operating activities:      
Net income (loss) $ 2,248us-gaap_NetIncomeLoss $ (6,162)us-gaap_NetIncomeLoss $ 709us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation and amortization 2,182us-gaap_DepreciationDepletionAndAmortization 2,450us-gaap_DepreciationDepletionAndAmortization 2,150us-gaap_DepreciationDepletionAndAmortization
Stock-based compensation 457us-gaap_ShareBasedCompensation 532us-gaap_ShareBasedCompensation 414us-gaap_ShareBasedCompensation
Loss on impairment of long-lived assets and goodwill of discontinued operations   1,700us-gaap_AssetImpairmentCharges  
Loss on disposition of property   4us-gaap_GainLossOnDispositionOfAssets 36us-gaap_GainLossOnDispositionOfAssets
Change in deferred gain (110)iin_IncreaseDecreaseSaleLeasebackTransactionDeferredGainNoncurrent (110)iin_IncreaseDecreaseSaleLeasebackTransactionDeferredGainNoncurrent (110)iin_IncreaseDecreaseSaleLeasebackTransactionDeferredGainNoncurrent
Change in allowance for doubtful accounts (4)us-gaap_ProvisionForDoubtfulAccounts (30)us-gaap_ProvisionForDoubtfulAccounts (69)us-gaap_ProvisionForDoubtfulAccounts
Equity in loss of partnerships 228us-gaap_IncomeLossFromEquityMethodInvestments 262us-gaap_IncomeLossFromEquityMethodInvestments 116us-gaap_IncomeLossFromEquityMethodInvestments
Loss on sale of discontinued operations 120us-gaap_GainLossOnSaleOfBusiness    
Gain on sale of investment in partnership     (822)us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Deferred income taxes     (7)us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in operating assets and liabilities:      
Accounts receivable (2,183)us-gaap_IncreaseDecreaseInAccountsReceivable 1,327us-gaap_IncreaseDecreaseInAccountsReceivable 1,555us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories (677)us-gaap_IncreaseDecreaseInInventories 1,221us-gaap_IncreaseDecreaseInInventories 789us-gaap_IncreaseDecreaseInInventories
Other assets 301us-gaap_IncreaseDecreaseInOtherOperatingAssets 500us-gaap_IncreaseDecreaseInOtherOperatingAssets (972)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable 389us-gaap_IncreaseDecreaseInAccountsPayable 1,066us-gaap_IncreaseDecreaseInAccountsPayable (2,252)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued expenses (347)us-gaap_IncreaseDecreaseInAccruedLiabilities (26)us-gaap_IncreaseDecreaseInAccruedLiabilities 240us-gaap_IncreaseDecreaseInAccruedLiabilities
Other liabilities 317us-gaap_IncreaseDecreaseInOtherOperatingLiabilities (60)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities 229us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash provided by operating activities 2,921us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 2,674us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 2,006us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows from investing activities:      
Proceeds from sale of property, plant and equipment 66us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment 39us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment  
Proceeds from sale of discontinued operations     626us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates
Proceeds from sale of investment in partnership 500us-gaap_ProceedsFromDivestitureOfInterestInSubsidiariesAndAffiliates    
Purchases of property, plant and equipment (1,524)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (969)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (1,735)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash used in investing activities (958)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (930)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (1,109)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows from financing activities:      
Proceeds from long-term borrowings 13,153us-gaap_ProceedsFromIssuanceOfLongTermDebt 15,332us-gaap_ProceedsFromIssuanceOfLongTermDebt 17,269us-gaap_ProceedsFromIssuanceOfLongTermDebt
Repayments of long-term borrowings (15,221)us-gaap_RepaymentsOfLongTermDebt (16,863)us-gaap_RepaymentsOfLongTermDebt (18,211)us-gaap_RepaymentsOfLongTermDebt
Proceeds from employee stock purchases and exercise of stock options 165us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions 145us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions 159us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
Payments of partership payable     (240)iin_PaymentsForPartershipPayables
Change in restricted cash (32)us-gaap_ProceedsFromRepaymentsOfRestrictedCashFinancingActivities (18)us-gaap_ProceedsFromRepaymentsOfRestrictedCashFinancingActivities (17)us-gaap_ProceedsFromRepaymentsOfRestrictedCashFinancingActivities
Change in checks written in excess of cash 237us-gaap_ProceedsFromRepaymentsOfBankOverdrafts (359)us-gaap_ProceedsFromRepaymentsOfBankOverdrafts 241us-gaap_ProceedsFromRepaymentsOfBankOverdrafts
Net cash used in financing activities (1,698)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (1,763)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (799)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Effect of exchange rate changes on cash (154)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 11us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 8us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net (decrease) increase in cash 111us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (8)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 106us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash, beginning of period 217us-gaap_Cash 225us-gaap_Cash 119us-gaap_Cash
Cash, end of period $ 328us-gaap_Cash $ 217us-gaap_Cash $ 225us-gaap_Cash