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Short And Long-Term Debt (Summary Of Short And Long-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Total Debt $ 7,008us-gaap_LongTermDebt $ 6,513us-gaap_LongTermDebt
Less: Current maturities (1,890)us-gaap_LongTermDebtCurrent (1,886)us-gaap_LongTermDebtCurrent
Total Long-Term Debt 5,118us-gaap_LongTermDebtNoncurrent 4,627us-gaap_LongTermDebtNoncurrent
Domestic Asset-Based Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Total Debt 1,093us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticAssetBasedRevolvingCreditFacilityMember		 3,843us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticAssetBasedRevolvingCreditFacilityMember
Foreign Overdraft And Letter Of Credit Facility [Member]    
Debt Instrument [Line Items]    
Total Debt 915us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember		 920us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember
Domestic Term-Loan [Member]    
Debt Instrument [Line Items]    
Total Debt $ 5,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember		 $ 1,750us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember