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Note 15 - Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Years Ended December 31, |
|  | 2019 |  |  | 2018 |
Net revenues from unaffiliated customers: |  |  |  |  |  |  |  |
Thermal |  | $ | 43,823 |  |  | $ | 55,994 |
EMS |  |  | 16,837 |  |  |  | 22,569 |
|  | $ | 60,660 |  |  | $ | 78,563 |
Depreciation/amortization: |  |  |  |  |  |  |  |
Thermal |  | $ | 1,810 |  |  | $ | 1,739 |
EMS |  |  | 118 |  |  |  | 122 |
Corporate |  |  | 14 |  |  |  | 10 |
|  | $ | 1,942 |  |  | $ | 1,871 |
|  | Years Ended December 31, |
|  | 2019 |  |  | 2018 |
Operating income (loss): |  |  |  |  |  |  |  |
Thermal |  | $ | 2,334 |  |  | $ | 1,218 |
EMS |  |  | 1,725 |  |  |  | 5,382 |
Corporate |  |  | (1,510 | ) |  |  | (1,420 | )
|  | $ | 2,549 |  |  | $ | 5,180 |
Earnings (loss) before income tax expense (benefit): |  |  |  |  |  |  |  |
Thermal |  | $ | 2,370 |  |  | $ | 1,024 |
EMS |  |  | 1,767 |  |  |  | 5,416 |
Corporate |  |  | (1,533 | ) |  |  | (1,397 | )
|  | $ | 2,604 |  |  | $ | 5,043 |
Income tax expense (benefit): |  |  |  |  |  |  |  |
Thermal |  | $ | 257 |  |  | $ | 1,331 |
EMS |  |  | 194 |  |  |  | 910 |
Corporate |  |  | (169 | ) |  |  | (235 | )
|  | $ | 282 |  |  | $ | 2,006 |
Net earnings (loss): |  |  |  |  |  |  |  |
Thermal |  | $ | 2,113 |  |  | $ | (307 | )
EMS |  |  | 1,573 |  |  |  | 4,506 |
Corporate |  |  | (1,364 | ) |  |  | (1,162 | )
|  | $ | 2,322 |  |  | $ | 3,037 |
Capital expenditures: |  |  |  |  |  |  |  |
Thermal |  | $ | 501 |  |  | $ | 2,149 |
EMS |  |  | 46 |  |  |  | 50 |
Corporate |  |  | 73 |  |  |  | 13 |
|  | $ | 620 |  |  | $ | 2,212 |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Years Ended December 31, |
|  | 2019 |  |  | 2018 |
Net revenues from unaffiliated customers: |  |  |  |  |  |  |  |
U.S. |  | $ | 25,283 |  |  | $ | 25,517 |
Foreign |  |  | 35,377 |  |  |  | 53,046 |
|  | $ | 60,660 |  |  | $ | 78,563 |
Long-lived Assets by Geographic Areas [Table Text Block] |
|  | December 31, |
|  | 2019 |  |  | 2018 |
Property and equipment: |  |  |  |  |  |  |  |
U.S. |  | $ | 2,163 |  |  | $ | 2,327 |
Foreign |  |  | 257 |  |  |  | 390 |
|  | $ | 2,420 |  |  | $ | 2,717 |
Asset [Member] |
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | December 31, |
|  | 2019 |  |  | 2018 |
Identifiable assets: |  |  |  |  |  |  |  |
Thermal |  | $ | 51,621 |  |  | $ | 55,343 |
EMS |  |  | 7,319 |  |  |  | 6,692 |
Corporate |  |  | 775 |  |  |  | 5,152 |
|  | $ | 59,715 |  |  | $ | 67,187 |

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