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v3.20.1

Note 17 - Subsequent Events (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Lessee, Operating Lease, Scheduled Base Rent Payments [Table Text Block] |
Period |  | Monthly Base Rent |
11/1/2020 – 11/30/2020 |  | $ | 0.00 |
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 |

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- Definition The tabular disclosure of scheduled base rent payments of operating lease of the lessee. + References No definition available. + Details
Name: | intt_LesseeOperatingLeaseScheduledBaseRentPaymentsTableTextBlock
Namespace Prefix: | intt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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