XML 72 R35.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 7 - Employee Benefit Plans (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 29, 2013 | Jun. 29, 2013
Pension and Other Postretirement Benefits Disclosure [Text Block] |  |
Pension Contributions | $ 166,000 | $ 258,000
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year |  | $ 49,000
Defined Benefit Plans, General Information |  | Supplemental employee retirement plan. The Company maintains supplemental employee retirement plans (each, a "SERP") with certain of its employees (each, a "Participant"). Under the SERPs, if the Participant remains in continuous service with the Company for a period of at least 30years, the Company will pay to the Participant a supplemental retirement benefit for the 15-year period following the Participant's retirement equal to 50% of the Participant's highest average annual base salary for five consecutive years in the 10-year period preceding the Participant's retirement. If the Participant retires prior to the later of age 65 or the completion of 30years of continuous service with the Company, but has completed at least 10 years of continuous service with the Company, the amount of the supplemental retirement benefit will be reduced by 1/360th for each month short of 30years that the Participant was employed by the Company.

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

X
- Definition Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition General information regarding defined benefit plans. A defined benefit pension plan is a plan that defines an amount of pension benefit to be provided, usually as a function of one or more factors such as age, years of service, or compensation. An other postretirement defined benefit plan is an arrangement that is mutually understood by an employer and its employees, whereby an employer undertakes to provide its employees with benefits other than pensions, after they retire in exchange for their services over a specified period of time, upon attaining a specified age while in service, or a combination of both. Any plan that is not a defined contribution plan is a defined benefit plan. General descriptive information about the employer's defined benefit plans, including employee groups covered, type of benefit formula, type of benefits, cost sharing arrangements, funding policy, types of assets held, and significant nonbenefit liabilities, if any. Also includes information pertaining to multiple employer plans, which are accounted for as single-employer plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Glossary Defined Benefit Postretirement Plan -URI http://asc.fasb.org/extlink&oid=6749240 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Defined Benefit Pension Plan -URI http://asc.fasb.org/extlink&oid=6510300 + Details
Name: | us-gaap_DefinedBenefitPlansGeneralInformation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of cash or cash equivalents contributed by the entity to fund its pension plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
Name: | us-gaap_PensionContributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration