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Note 8 - Other Current Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Current Liabilities [Table Text Block] |
|  | 2019 |  |  | 2018 |
Accrued warranty |  | $ | 334 |  |  | $ | 346 |
Accrued rent/facility costs |  |  | 25 |  |  |  | 406 |
Other |  |  | 138 |  |  |  | 356 |
Total other current liabilities |  | $ | 497 |  |  | $ | 1,108 |

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- Definition Tabular disclosure of current liabilities. + References No definition available. + Details
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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