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Note 17 - Subsequent Events (Details) - Subsequent Event [Member] | Jan. 23, 2020 USD ($)
--- | ---
11/1/2020 – 11/30/2020 | $ 0
12/1/2020 – 10/31/2021 | 21,257.10
11/1/2021 – 10/31/2022 | 21,894.81
11/1/2022 – 10/31/2023 | 22,551.66
11/1/2023 – 10/31/2024 | 23,228.21
11/1/2024 – 10/31/2025 | 23,925.05
11/1/2025 – 11/30/2025 | $ 24,642.80

X
- Definition Amount of lessee's base monthly rent for operating lease, due in months thirteen through twenty-four after renewal. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseRenewalBaseMonthlyRentMonth13Through24
Namespace Prefix: | intt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lessee's base monthly rent for operating lease, due in months twenty-five through thirty-six after renewal. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseRenewalBaseMonthlyRentMonth25Through36
Namespace Prefix: | intt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lessee's base monthly rent for operating lease, due in months thirty-seven through forty-eight after renewal. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseRenewalBaseMonthlyRentMonth37Through48
Namespace Prefix: | intt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lessee's base monthly rent for operating lease, due in months forty-nine through sixty after renewal. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseRenewalBaseMonthlyRentMonth49Through60
Namespace Prefix: | intt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lessee's base monthly rent for operating lease, due in month sixty-one after renewal. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseRenewalBaseMonthlyRentMonth61
Namespace Prefix: | intt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lessee's base monthly rent for operating lease, due first month after renewal. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseRenewalBaseMonthlyRentMonthOne
Namespace Prefix: | intt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lessee's base monthly rent for operating lease, due in months two through twelve after renewal. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseRenewalBaseMonthlyRentMonthTwoThroughTwelve
Namespace Prefix: | intt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |