XML 105 R58.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 8 - Long-Term Debt (Details) - Amortized Financing Costs (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 27, 2014
Amortized Financing Costs [Abstract] |
2015 | $ 102
2016 | $ 69

X
- Definition The amount of amortization costs in the next 12 months. + References No definition available. + Details
Name: | iiin_AmortizationOfFinancingCostsNext12Months
Namespace Prefix: | iiin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of amortization costs in year two. + References No definition available. + Details
Name: | iiin_AmortizationOfFinancingCostsYear2
Namespace Prefix: | iiin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | iiin_AmortizedFinancingCostsAbstract
Namespace Prefix: | iiin_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration