XML 54 R34.htm IDEA: XBRL DOCUMENT
v3.24.3

Note 8 - Long-term Debt (Tables) | 12 Months Ended
--- | ---
Sep. 28, 2024
Notes Tables |
Schedule of Amortization of Financing Costs for Debt [Table Text Block] |
Fiscal year |  | In thousands |
2025 |  | $ | 50 |
2026 |  |  | 51 |
2027 |  |  | 50 |
2028 |  |  | 23 |
2029 |  |  | - |

X
- Definition Tabular disclosure for a fiscal year schedule of the amortization of financing costs for debt. + References No definition available. + Details
Name: | iiin_ScheduleOfAmortizationOfFinancingCostsForDebtTableTextBlock
Namespace Prefix: | iiin_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration