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Note 3 - Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Goodwill [Table Text Block] |
Sigma |  | $ | 1,656 |
Thermonics |  |  | 50 |
Ambrell |  |  | 12,032 |
Total |  | $ | 13,738 |
Schedule of Carrying Value of Finite-lived Intangible Assets [Table Text Block] |
Balance - January 1, 2018 |  | $ | 9,304 |
Amortization |  |  | (1,103 | )
Balance - December 31, 2018 |  |  | 8,201 |
Amortization |  |  | (1,257 | )
Balance - December 31, 2019 |  | $ | 6,944 |
Schedule Of Intangible Assets [Table Text Block] |
|  | December 31, 2019 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Finite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 10,480 |  |  | $ | 3,805 |  |  | $ | 6,675 |
Technology |  |  | 600 |  |  |  | 380 |  |  |  | 220 |
Patents |  |  | 590 |  |  |  | 541 |  |  |  | 49 |
Software |  |  | 270 |  |  |  | 270 |  |  |  | - |
Trade name |  |  | 140 |  |  |  | 140 |  |  |  | - |
Total finite-lived intangible assets |  |  | 12,080 |  |  |  | 5,136 |  |  |  | 6,944 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  | 6,710 |  |  |  | - |  |  |  | 6,710 |
Total intangible assets |  | $ | 18,790 |  |  | $ | 5,136 |  |  | $ | 13,654 |
|  | December 31, 2018 |
|  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Finite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | $ | 10,480 |  |  | $ | 2,717 |  |  | $ | 7,763 |
Technology |  |  | 600 |  |  |  | 250 |  |  |  | 350 |
Patents |  |  | 590 |  |  |  | 502 |  |  |  | 88 |
Software |  |  | 270 |  |  |  | 270 |  |  |  | - |
Trade name |  |  | 140 |  |  |  | 140 |  |  |  | - |
Total finite-lived intangible assets |  |  | 12,080 |  |  |  | 3,879 |  |  |  | 8,201 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  | 6,710 |  |  |  | - |  |  |  | 6,710 |
Total intangible assets |  | $ | 18,790 |  |  | $ | 3,879 |  |  | $ | 14,911 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
2020 |  | $ | 1,233 |
2021 |  | $ | 1,227 |
2022 |  | $ | 1,167 |
2023 |  | $ | 1,067 |
2024 |  | $ | 980 |

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