Represents dividend distribution of rights.

No definition available.

Name:	iiin_DividendDistributionOfRights1
Namespace Prefix:	iiin_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	iiin_Note18RightsAgreementDetailsLineItems
Namespace Prefix:	iiin_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the beneficial ownership percentage that must be obtained by either a person or a group of affiliated or associates persons that will cause the rights distributed to be exercisable.

+ References

No definition available.

+ Details

Name:	iiin_OwnershipPercentageToTriggerRightsExercisable
Namespace Prefix:	iiin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the portion of the Company that, if sold will trigger the exercisability of the rights.

+ References

No definition available.

+ Details

Name:	iiin_PortionOfCompanySoldTriggersExercisabilityOfRights
Namespace Prefix:	iiin_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the number of rights that attach to each share of the Company's common stock that is issued after May 17, 1999.

+ References

No definition available.

+ Details

Name:	iiin_RightsAssignedToCommonStockIssued
Namespace Prefix:	iiin_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ 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.(i)(4))

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

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Note 18 - Rights Agreement (Details) (USD $)	0 Months Ended
Note 18 - Rights Agreement (Details) (USD $)	May 17, 1999	Apr. 26, 1999	Sep. 27, 2014
Note 18 - Rights Agreement (Details) [Line Items]
Dividend Distribution of Rights (in Shares)		1
Rights Assigned to Common Stock Issued	$ 1
Ownership Percentage to Trigger Rights Exercisable		20.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 0.005
Portion of Company Sold Triggers Exercisability of Rights		50.00%
Series A Junior Participating Preferred Stock [Member]
Note 18 - Rights Agreement (Details) [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 46