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Short And Long-Term Debt (Summary Of Short And Long-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Total Debt $ 6,513us-gaap_LongTermDebt $ 8,481us-gaap_LongTermDebt
Less: Current maturities (1,886)us-gaap_LongTermDebtCurrent (2,210)us-gaap_LongTermDebtCurrent
Total Long-Term Debt 4,627us-gaap_LongTermDebtNoncurrent 6,271us-gaap_LongTermDebtNoncurrent
Domestic Asset-Based Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Total Debt 3,843us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticAssetBasedRevolvingCreditFacilityMember
4,450us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticAssetBasedRevolvingCreditFacilityMember
Foreign Overdraft And Letter Of Credit Facility [Member]    
Debt Instrument [Line Items]    
Total Debt 920us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember
1,281us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember
Domestic Term Loan [Member]    
Debt Instrument [Line Items]    
Total Debt $ 1,750us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticTermLoanMember
$ 2,750us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticTermLoanMember