XML 44 R30.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 5 - Revenue From Contracts With Customers (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Years Ended December 31, |
|  | 2020 |  |  | 2019 |
Net revenues by customer type: |  |  |  |  |  |  |  |
End user |  | $ | 48,041 |  |  | $ | 55,074 |
OEM/Integrator |  |  | 5,782 |  |  |  | 5,586 |
|  | $ | 53,823 |  |  | $ | 60,660 |
Net revenues by product type: |  |  |  |  |  |  |  |
Thermal test |  | $ | 15,768 |  |  | $ | 17,631 |
Thermal process |  |  | 18,966 |  |  |  | 20,079 |
Semiconductor test |  |  | 13,112 |  |  |  | 16,273 |
Service/other |  |  | 5,977 |  |  |  | 6,677 |
|  | $ | 53,823 |  |  | $ | 60,660 |
Net revenues by market: |  |  |  |  |  |  |  |
Semi Market |  | $ | 26,870 |  |  | $ | 30,953 |
Industrial |  |  | 17,341 |  |  |  | 21,231 |
Defense/aerospace |  |  | 6,314 |  |  |  | 4,842 |
Telecommunications |  |  | 1,715 |  |  |  | 1,845 |
Other Multi Markets |  |  | 1,583 |  |  |  | 1,789 |
|  | $ | 53,823 |  |  | $ | 60,660 |
Schedule of Changes in Allowance for Doubtful Accounts Receivable [Table Text Block] |
Balance - January 1, 2019 |  | $ | 233 |
Bad debt expense |  |  | 3 |
Write-offs |  |  | (25 | )
Balance - December 31, 2019 |  |  | 211 |
Bad debt expense |  |  | - |
Write-offs |  |  | - |
Foreign currency translation adjustments |  |  | 1 |
Balance - December 31, 2020 |  | $ | 212 |

X
- Definition Tabular disclosure of the changes in the allowance for doubtful accounts receivable. + References No definition available. + Details
Name: | intt_ScheduleOfChangesInAllowanceForDoubtfulAccountsReceivableTableTextBlock
Namespace Prefix: | intt_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
Name: | us-gaap_DisaggregationOfRevenueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum: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