Amount of total increase to the Line of Credit maximum borrowing capacity allowed, subject to certain requirements.

No definition available.

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Namespace Prefix:	iec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility Maximum Borrowing Capacity As Percentage Of Eligible Investment Grade Accounts

+ References

No definition available.

+ Details

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- Definition

Amount of minimum incremental increase to the Line of Credit maximum borrowing capacity allowed.

+ References

No definition available.

+ Details

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Namespace Prefix:	iec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Covenant, Minimum Fixed Charge Coverage Ratio

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit Facility, Maximum Borrowing Capacity Based on Eligible Inventories

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Maximum Borrowing Capacity as Percentage of Eligible Receivables

+ References

No definition available.

+ Details

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Namespace Prefix:	iec_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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-Name Accounting Standards Codification
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-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

+ Details

Name:	us-gaap_FinanceLeaseLiability
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseRenewalTerm
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

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

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the fee for available but unused credit capacity under the credit facility.

+ References

+ Details

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

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of the required periodic payment applied to principal.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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CREDIT FACILITIES - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended
CREDIT FACILITIES - Narrative (Details) - USD ($)	Mar. 01, 2021	Jul. 02, 2021	Jun. 26, 2020	Jul. 02, 2021	Jun. 26, 2020	Sep. 30, 2020	Jun. 04, 2020
Line of Credit Facility [Line Items]
Total finance lease obligation		$ 31,770,000		$ 31,770,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 45,000,000.0		$ 45,000,000.0		$ 45,000,000.0	$ 45,000,000.0
Additional increase to borrowing capacity allowed							55,000,000.0
Minimum incremental increase to borrowing capacity allowed							$ 5,000,000.0
Interest Rate		2.75%		2.75%		2.75%
Maturity date				Jun. 04, 2023
Maximum borrowing capacity as percentage of eligible receivables		85.00%		85.00%		85.00%
Maximum borrowing capacity as percentage of eligible investment grade accounts		90.00%		90.00%		90.00%
Maximum borrowing capacity based on eligible inventories		$ 30,000,000.0		$ 30,000,000.0		$ 30,000,000.0
Current borrowing capacity		45,000,000.0		45,000,000.0		39,400,000
Available capacity on credit facility		12,000,000.0		12,000,000.0		$ 19,400,000
Average Revolver balances				$ 31,700,000	$ 25,200,000
Basis spread on variable rate				1.75%
Unused capacity, commitment fee percentage				0.25%
Unused capacity, commitment fee		$ 30,900	$ 5,800	$ 54,500	$ 18,300
Commitment fee amount				$ 45,000,000.0
Minimum Fixed Charge Coverage Ratio		1.10		1.10
Revolving Credit Facility \| Minimum
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage				0.25%
Revolving Credit Facility \| Maximum
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage				0.375%
Revolving Credit Facility \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum
Line of Credit Facility [Line Items]
Interest Rate							1.00%
Master Lease
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 10,000,000.0
Interest Rate		3.00%		3.00%		3.00%
Renewal term							12 months
Maturity date				Jun. 04, 2023
Long-term line of credit		$ 200,000		$ 200,000		$ 1,800,000
Total finance lease obligation		$ 6,400,000		$ 6,400,000
Jetview Term Loan
Line of Credit Facility [Line Items]
Interest Rate		3.65%		3.65%
Maturity date	Mar. 01, 2026			Mar. 01, 2026
Long-term line of credit	$ 3,700,000
Periodic payment of principal	20,700
Periodic balloon payment	2,500,000
Current borrowing capacity	$ 3,700,000
Debt instrument term	5 years
Jetview Term Loan \| London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.65%