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STOCK-BASED COMPENSATION (Details 3) (USD $)
In Thousands, except Share data, unless otherwise specified
6 Months Ended
Mar. 27, 2015
Mar. 28, 2014
Number of Non-vested Shares [Roll Forward]    
Shares withheld for payment of taxes upon vesting of restricted stock (in shares) (16,068)iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStock (996)iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStock
Wgtd. Avg. Grant Date Fair Value [Roll Forward]    
Shares withheld for payment of taxes upon vesting of restricted stock (in dollars per share) $ 1.88iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStockWeightedAverageGrantDateFairValue $ 1.43iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStockWeightedAverageGrantDateFairValue
Restricted (Non-vested) Stock [Member]    
Number of Non-vested Shares [Roll Forward]    
Outstanding, beginning of period (in shares) 322,873us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
275,474us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Granted (in shares) 163,655us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
155,703us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Vested (in shares) (316,539)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
(73,878)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Shares withheld for payment of taxes upon vesting of restricted stock (in shares) (133,329)iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStock
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
(18,208)iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStock
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Forfeited (in shares) (1,200)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
(31,216)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Outstanding, end of period (in shares) 35,460us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
307,875us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Wgtd. Avg. Grant Date Fair Value [Roll Forward]    
Outstanding, beginning of period (in dollars per share) $ 4.97us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 5.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Granted (in dollars per share) $ 5.06us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 4.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Vested (in dollars per share) $ 5.08us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 5.75us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Shares withheld for payment of taxes upon vesting of restricted stock (in dollars per share) $ 4.53iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStockWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 4.28iec_ShareBasedCompensationArrangementSharesWithHeldForPaymentOfTaxesUponVestingOfRestrictedStockWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Forfeited (in dollars per share) $ 3.91us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 6.55us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Outstanding, end of period (in dollars per share) $ 4.23us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 5.14us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
For non-vested shares    
Expense not yet recognized (000s) $ 163us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 924us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Weighted average remaining years for vesting 2 years 11 days 3 years 5 months 1 day
For shares vested    
Aggregate fair value on vesting dates (000s) $ 2,062us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
$ 388us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember