CAPITAL LEASE - Narrative (Details) $ in Millions	Nov. 18, 2016 USD ($) renewal_option
Sale Leaseback Transaction [Line Items]
Aggregate purchase price	$ 5.8
Holdback amount	0.1
Net book value of assets sold	4.6
Value of assets acquired under the lease	$ 5.8
Initial term of lease	15 years
Number of lease renewal options \| renewal_option	2
Term of renewal options (in years)	5 years
Annual rental payment	$ 0.5
Late payment fee (percent)	5.00%
Interest rate (percent)	18.00%
Maximum [Member]
Sale Leaseback Transaction [Line Items]
Annual percentage increase	2.00%
Minimum [Member]
Sale Leaseback Transaction [Line Items]
Consumer pricing index multiplier (lesser of)	1.25
Other Noncurrent Liabilities [Member]
Sale Leaseback Transaction [Line Items]
Deferred gain recorded	$ 1.1

Lessee Leasing Arrangements, Operating Leases, Number of Lease Renewal Options

No definition available.

Name:	iec_LesseeLeasingArrangementsOperatingLeasesNumberofLeaseRenewalOptions
Namespace Prefix:	iec_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Leaseback Transaction, Annual Rental Payments Increase, Percent

+ References

No definition available.

+ Details

Name:	iec_SaleLeasebackTransactionAnnualRentalPaymentsIncreasePercent
Namespace Prefix:	iec_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Leaseback Transaction, Annual Rental Payments, Year One

+ References

No definition available.

+ Details

Name:	iec_SaleLeasebackTransactionAnnualRentalPaymentsYearOne
Namespace Prefix:	iec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Sale Leaseback Transaction, Consumer Price Index Multiplier

+ References

No definition available.

+ Details

Name:	iec_SaleLeasebackTransactionConsumerPriceIndexMultiplier
Namespace Prefix:	iec_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Leaseback Transaction, Holdback Amount

+ References

No definition available.

+ Details

Name:	iec_SaleLeasebackTransactionHoldbackAmount
Namespace Prefix:	iec_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Sale Leaseback Transaction, Rental Payments, Late Payment Penalty, Interest Rate

+ References

No definition available.

+ Details

Name:	iec_SaleLeasebackTransactionRentalPaymentsLatePaymentPenaltyInterestRate
Namespace Prefix:	iec_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Leaseback Transaction, Rental Payments, Late Payment Penalty, Percentage

+ References

No definition available.

+ Details

Name:	iec_SaleLeasebackTransactionRentalPaymentsLatePaymentPenaltyPercentage
Namespace Prefix:	iec_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sale Leaseback Transaction, Value of Assets Acquired

+ References

No definition available.

+ Details

Name:	iec_SaleLeasebackTransactionValueofAssetsAcquired
Namespace Prefix:	iec_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The portion of the gain that will be recorded as income or a reduction in rent expense in future periods less amounts recognized in the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 35
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77907795&loc=d3e50609-112754

+ Details

Name:	us-gaap_SaleLeasebackTransactionDeferredGainNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow before closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in investing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51843-112757

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51831-112757

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 51
-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51840-112757

+ Details

Name:	us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleLeasebackTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The net book value of the asset(s) sold in connection with the sale of the property to another party and lease back to the seller.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51843-112757

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 40
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=77888430&loc=SL77919786-209982

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51831-112757

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 51
-URI http://asc.fasb.org/extlink&oid=82846721&loc=d3e51840-112757

+ Details

Name:	us-gaap_SaleLeasebackTransactionNetBookValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: