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Note 16 - Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Years Ended December 31, |
|  | 2020 |  |  | 2019 |
Net revenues from unaffiliated customers: |  |  |  |  |  |  |  |
Thermal |  | $ | 40,209 |  |  | $ | 43,823 |
EMS |  |  | 13,614 |  |  |  | 16,837 |
|  | $ | 53,823 |  |  | $ | 60,660 |
Depreciation/amortization: |  |  |  |  |  |  |  |
Thermal |  | $ | 1,727 |  |  | $ | 1,810 |
EMS |  |  | 109 |  |  |  | 118 |
Corporate |  |  | 27 |  |  |  | 14 |
|  | $ | 1,863 |  |  | $ | 1,942 |
Operating income (loss): |  |  |  |  |  |  |  |
Thermal |  | $ | 325 |  |  | $ | 2,334 |
EMS |  |  | (1,113 | ) |  |  | 1,725 |
Corporate |  |  | (429 | ) |  |  | (1,510 | )
|  | $ | (1,217 | ) |  | $ | 2,549 |
Earnings (loss) before income tax expense (benefit): |  |  |  |  |  |  |  |
Thermal |  | $ | 306 |  |  | $ | 2,370 |
EMS |  |  | (1,077 | ) |  |  | 1,767 |
Corporate |  |  | (460 | ) |  |  | (1,533 | )
|  | $ | (1,231 | ) |  | $ | 2,604 |
Income tax expense (benefit): |  |  |  |  |  |  |  |
Thermal |  | $ | 84 |  |  | $ | 257 |
EMS |  |  | (294 | ) |  |  | 194 |
Corporate |  |  | (126 | ) |  |  | (169 | )
|  | $ | (336 | ) |  | $ | 282 |
Net earnings (loss): |  |  |  |  |  |  |  |
Thermal |  | $ | 222 |  |  | $ | 2,113 |
EMS |  |  | (783 | ) |  |  | 1,573 |
Corporate |  |  | (334 | ) |  |  | (1,364 | )
|  | $ | (895 | ) |  | $ | 2,322 |
Capital expenditures: |  |  |  |  |  |  |  |
Thermal |  | $ | 371 |  |  | $ | 501 |
EMS |  |  | 284 |  |  |  | 46 |
Corporate |  |  | 3 |  |  |  | 73 |
|  | $ | 658 |  |  | $ | 620 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Years Ended December 31, |
|  | 2020 |  |  | 2019 |
Net revenues from unaffiliated customers: |  |  |  |  |  |  |  |
U.S. |  | $ | 22,211 |  |  | $ | 25,283 |
Foreign |  |  | 31,612 |  |  |  | 35,377 |
|  | $ | 53,823 |  |  | $ | 60,660 |
Long-lived Assets by Geographic Areas [Table Text Block] |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Property and equipment: |  |  |  |  |  |  |  |
U.S. |  | $ | 2,053 |  |  | $ | 2,163 |
Foreign |  |  | 297 |  |  |  | 257 |
|  | $ | 2,350 |  |  | $ | 2,420 |
Asset [Member] |
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Identifiable assets: |  |  |  |  |  |  |  |
Thermal |  | $ | 50,782 |  |  | $ | 51,621 |
EMS |  |  | 9,667 |  |  |  | 7,319 |
Corporate |  |  | 1,581 |  |  |  | 775 |
|  | $ | 62,030 |  |  | $ | 59,715 |

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