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Short And Long-Term Debt (Schedule Of Payments Due By Period) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
2015 $ 1,886us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths  
2016 780us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo  
2017 4us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree  
2018 3,843us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour  
Thereafter     
Total Debt 6,513us-gaap_LongTermDebt 8,481us-gaap_LongTermDebt
Domestic Asset-Based Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
2015     
2016     
2017     
2018 3,843us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticAssetBasedRevolvingCreditFacilityMember
 
Thereafter     
Total Debt 3,843us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticAssetBasedRevolvingCreditFacilityMember
4,450us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticAssetBasedRevolvingCreditFacilityMember
Domestic Term Loan [Member]    
Debt Instrument [Line Items]    
2015 1,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticTermLoanMember
 
2016 750us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticTermLoanMember
 
2017     
2018     
Thereafter     
Total Debt 1,750us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticTermLoanMember
2,750us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_DomesticTermLoanMember
Foreign Overdraft And Letter Of Credit Facility [Member]    
Debt Instrument [Line Items]    
2015 886us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember
 
2016 30us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember
 
2017 4us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember
 
2018     
Thereafter     
Total Debt $ 920us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember
$ 1,281us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= iin_ForeignOverdraftAndLetterOfCreditFacilityMember