XML 62 R48.htm IDEA: XBRL DOCUMENT
v3.23.3

Note 8 - Long-term Debt - Amortization of Financing Costs (Details) $ in Thousands | Sep. 30, 2023 USD ($)
--- | ---
2024, Amortization | $ 50
Amortization of Financing Costs, Year 2 | 50
Amortization of Financing Costs, Year 3 | 51
Amortization of Financing Costs, Year 4 | 50
Amortization of Financing Costs, Year 5 | $ 23

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: | instant

X
- Definition The amount of amortization costs in year 2. + References No definition available. + Details
Name: | iiin_AmortizationOfFinancingCostsYear2
Namespace Prefix: | iiin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of amortization costs in year 3. + References No definition available. + Details
Name: | iiin_AmortizationOfFinancingCostsYear3
Namespace Prefix: | iiin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | iiin_AmortizationOfFinancingCostsYear4
Namespace Prefix: | iiin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of amortization costs in year 5. + References No definition available. + Details
Name: | iiin_AmortizationOfFinancingCostsYear5
Namespace Prefix: | iiin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant