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Note 17 - Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Years Ended December 31, |
|  | 2023 |  |  | 2022 |
Revenue: |  |  |  |  |  |  |  |
Electronic Test |  | $ | 41,016 |  |  | $ | 40,219 |
Environmental Technologies |  |  | 30,801 |  |  |  | 30,172 |
Process Technologies |  |  | 51,485 |  |  |  | 46,437 |
Total Revenue |  | $ | 123,302 |  |  | $ | 116,828 |
Division operating income: |  |  |  |  |  |  |  |
Electronic Test |  | $ | 10,189 |  |  | $ | 9,931 |
Environmental Technologies |  |  | 3,073 |  |  |  | 3,817 |
Process Technologies |  |  | 9,544 |  |  |  | 8,230 |
Total division operating income |  |  | 22,806 |  |  |  | 21,978 |
Corporate expenses |  |  | (10,272 | ) |  |  | (8,563 | )
Acquired intangible amortization |  |  | (2,095 | ) |  |  | (2,694 | )
Interest expense |  |  | (679 | ) |  |  | (635 | )
Other income |  |  | 1,288 |  |  |  | 59 |
Earnings before income tax expense |  | $ | 11,048 |  |  | $ | 10,145 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Years Ended December 31, |
|  | 2023 |  |  | 2022 |
Revenue: |  |  |  |  |  |  |  |
U.S. |  | $ | 45,222 |  |  | $ | 49,096 |
Foreign |  |  | 78,080 |  |  |  | 67,732 |
|  | $ | 123,302 |  |  | $ | 116,828 |
Long-Lived Assets by Geographic Areas [Table Text Block] |
|  | December 31, |
|  | 2023 |  |  | 2022 |
Property and equipment: |  |  |  |  |  |  |  |
U.S. |  | $ | 2,502 |  |  | $ | 2,658 |
Foreign |  |  | 688 |  |  |  | 474 |
|  | $ | 3,190 |  |  | $ | 3,132 |
Asset [Member] |
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | December 31, |
|  | 2023 |  |  | 2022 |
Identifiable assets: |  |  |  |  |  |  |  |
Electronic Test |  | $ | 32,505 |  |  | $ | 31,143 |
Environmental Technologies |  |  | 16,772 |  |  |  | 18,040 |
Process Technologies |  |  | 56,842 |  |  |  | 56,866 |
Corporate |  |  | 28,710 |  |  |  | 4,017 |
|  | $ | 134,829 |  |  | $ | 110,066 |
Capital expenditures: |  |  |  |  |  |  |  |
Electronic Test |  | $ | 599 |  |  | $ | 80 |
Environmental Technologies |  |  | 495 |  |  |  | 368 |
Process Technologies |  |  | 170 |  |  |  | 543 |
Corporate |  |  | 27 |  |  |  | 374 |
|  | $ | 1,291 |  |  | $ | 1,365 |

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