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Note 12 - Contingencies (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 28, 2014 | Jun. 28, 2014
Note 12 - Contingencies (Details) [Line Items] |  |
Insurance Recoveries | $ 2,700,000 | $ 4,000,000
Cost of Sales [Member] |  |
Note 12 - Contingencies (Details) [Line Items] |  |
Insurance Recoveries | 1,400,000 | 2,500,000
General and Administrative Expense [Member] |  |
Note 12 - Contingencies (Details) [Line Items] |  |
Insurance Recoveries | $ 73,000 | $ 98,000

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- Details
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Namespace Prefix: | iiin_
Data Type: | xbrli:stringItemType
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- Definition The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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