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Note 16 - Segment Information (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Electronic Test |  | $ | 9,797 |  |  | $ | 9,054 |  |  | $ | 18,575 |  |  | $ | 17,555 |
Environmental Technologies |  |  | 7,507 |  |  |  | 6,647 |  |  |  | 14,500 |  |  |  | 12,845 |
Process Technologies |  |  | 12,267 |  |  |  | 6,119 |  |  |  | 20,577 |  |  |  | 10,976 |
Total revenue |  | $ | 29,571 |  |  | $ | 21,820 |  |  | $ | 53,652 |  |  | $ | 41,376 |
Income from divisional operations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Electronic Test |  | $ | 2,193 |  |  | $ | 3,237 |  |  | $ | 4,080 |  |  | $ | 6,224 |
Environmental Technologies |  |  | 1,070 |  |  |  | 1,113 |  |  |  | 1,872 |  |  |  | 2,036 |
Process Technologies |  |  | 2,569 |  |  |  | 1,161 |  |  |  | 3,299 |  |  |  | 1,617 |
Total income from divisional operations |  |  | 5,832 |  |  |  | 5,511 |  |  |  | 9,251 |  |  |  | 9,877 |
Corporate expenses |  |  | (2,339 | ) |  |  | (2,171 | ) |  |  | (4,174 | ) |  |  | (3,653 | )
Acquired intangible amortization |  |  | (765 | ) |  |  | (305 | ) |  |  | (1,547 | ) |  |  | (609 | )
Other income (expense) |  |  | (158 | ) |  |  | 21 |  |  |  | (305 | ) |  |  | 19 |
Earnings before income tax expense |  | $ | 2,570 |  |  | $ | 3,056 |  |  | $ | 3,225 |  |  | $ | 5,634 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. |  | $ | 14,068 |  |  | $ | 6,632 |  |  | $ | 23,302 |  |  | $ | 12,379 |
Foreign |  |  | 15,503 |  |  |  | 15,188 |  |  |  | 30,350 |  |  |  | 28,997 |
|  | $ | 29,571 |  |  | $ | 21,820 |  |  | $ | 53,652 |  |  | $ | 41,376 |
Long-Lived Assets by Geographic Areas [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2022 |  |  | 2021 |
Property and equipment: |  |  |  |  |  |  |  |
U.S. |  | $ | 2,566 |  |  | $ | 2,346 |
Foreign |  |  | 392 |  |  |  | 342 |
|  | $ | 2,958 |  |  | $ | 2,688 |
Asset [Member] |
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2022 |  |  | 2021 |
Identifiable assets: |  |  |  |  |  |  |  |
Electronic Test |  | $ | 28,735 |  |  | $ | 26,251 |
Environmental Technologies |  |  | 16,900 |  |  |  | 15,411 |
Process Technologies |  |  | 54,300 |  |  |  | 52,120 |
Corporate |  |  | 6,090 |  |  |  | 10,123 |
|  | $ | 106,025 |  |  | $ | 103,905 |

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