Borrowing Percentage

No definition available.

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Period Type:	duration

- Definition

Number Of Customers

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Percentage Of Proceeds From Certain Asset Sales Required To Pay Down Term Loan

+ References

No definition available.

+ Details

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Namespace Prefix:	iin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(c))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph c

-Article 4

+ Details

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

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

+ Details

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

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

The effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

Aggregate carrying amount of current liabilities (due within one year or within the normal operating cycle if longer) not separately disclosed in the balance sheet. Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 6

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-Topic 210

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6904-107765

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Short And Long-Term Debt (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended
Short And Long-Term Debt (Narrative) (Details) (USD $)	Feb. 28, 2014	Dec. 31, 2014 customer	Dec. 31, 2013	Dec. 31, 2012
Short And Long-Term Debt [Line Items]
Debt instrument maturity date		Feb. 28, 2018
Eligible accounts receivable borrowing percentage	85.00%iin_BorrowingPercentage	80.00%iin_BorrowingPercentage
Number of specific customers with 90% borrowing percentage		2iin_NumberOfCustomers
Credit facility interest rate		4.51%	4.30%	4.52%
Quarterly installment amounts		$ 250,000us-gaap_DebtInstrumentPeriodicPayment
Percentage of proceeds from certain asset sales required to pay down term loan		100.00%
Amount considered debt default		50,000us-gaap_DebtDefaultLongtermDebtAmount
Interest Rate Swap [Member]
Short And Long-Term Debt [Line Items]
Debt instrument maturity date		Aug. 31, 2016
Quarterly installment amounts		250,000
Interest rate swap, notional amount		3,750,000
Other current liabilities		19,000	22,000
Federal Funds Rate [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		0.50%
Term Loan [Member]
Short And Long-Term Debt [Line Items]
Loan amount		4,000,000
Eligibility Percentage For Two Specific Customers [Member]
Short And Long-Term Debt [Line Items]
Eligible accounts receivable borrowing percentage		90.00%
Minimum [Member] \| Interest Rate Swap [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		0.80%
Minimum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		2.75%
Minimum [Member] \| Federal Funds Rate [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		0.00%
Maximum [Member] \| Interest Rate Swap [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		1.45%
Maximum [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		4.00%
Maximum [Member] \| Federal Funds Rate [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		1.25%
Revolving Credit Facility [Member]
Short And Long-Term Debt [Line Items]
Credit facility, borrowing capacity		8,000,000
Line of credit facility, Non-use fee percentage		0.25%
Amount outstanding		3,843,000	4,450,000
Remaining borrowing capacity under credit facility		3,456,000	1,682,000
Letters Of Credit [Member]
Short And Long-Term Debt [Line Items]
Credit facility, borrowing capacity		200,000
Oversea Chinese Banking Corporation Ltd. Line of Credit [Member]
Short And Long-Term Debt [Line Items]
Credit facility, borrowing capacity		1,876,000
Credit facility interest rate		4.50%	3.95%
Amount outstanding		920,000	1,281,000
Remaining borrowing capacity under credit facility		$ 956,000	888,000
Oversea Chinese Banking Corporation Ltd. Line of Credit [Member] \| Minimum [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		0.75%
Oversea Chinese Banking Corporation Ltd. Line of Credit [Member] \| Maximum [Member]
Short And Long-Term Debt [Line Items]
Basis spread on variable rate of debt instruments		2.50%