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Intangible Assets | 12 Months Ended
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Dec. 31, 2020
Intangible Assets |
Intangible Assets | Note 8 – Intangible Assets Intangible asset activity for the two years ended December 31, 2020 is detailed in the following table; ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​
in thousands |  | Acquired Technology |  | Customer Relationships |  | Other |  | Total Intangible Assets
Net balance at December 31, 2018 | ​ | $ | 8,795 | ​ | $ | 30,408 | ​ | $ | 6,259 | ​ | $ | 45,462
Net foreign currency translation | ​ |  | 120 | ​ |  | 118 | ​ |  | (21) | ​ |  | 217
Amortization expense | ​ |  | (3,461) | ​ |  | (3,642) | ​ |  | (2,367) | ​ |  | (9,470)
Net balance at December 31, 2019 | ​ | ​ | 5,454 | ​ | ​ | 26,884 | ​ | ​ | 3,871 | ​ | ​ | 36,209
Additions | ​ |  | 46 | ​ | ​ | — | ​ | ​ | 87 | ​ |  | 133
Disposals | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (58) | ​ | ​ | (58)
Net foreign currency translation | ​ |  | 53 | ​ | ​ | (58) | ​ | ​ | 39 | ​ |  | 34
Amortization expense | ​ |  | (3,276) | ​ | ​ | (3,626) | ​ | ​ | (2,220) | ​ |  | (9,122)
Net balance at December 31, 2020 | ​ | $ | 2,277 | ​ | $ | 23,200 | ​ | $ | 1,719 | ​ | $ | 27,196
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2020 balance at cost | ​ | $ | 43,546 | ​ | $ | 39,946 | ​ | $ | 13,593 | ​ | $ | 97,085
Accumulated amortization | ​ |  | (41,269) | ​ |  | (16,746) | ​ |  | (11,874) | ​ |  | (69,889)
Net balance at December 31, 2020 | ​ | $ | 2,277 | ​ | $ | 23,200 | ​ | $ | 1,719 | ​ | $ | 27,196
​ Certain intangible assets are denominated in local currencies and are subject to currency fluctuations. As a result of the Company rebranding, the values of certain intangible assets were written down during the second quarter of 2018, and impairment charges of $0.5 million were recorded for the year ended December 31, 2018. Expected amortization of the intangible assets for the years ended: ​
​ | ​ | ​ | ​
December 31, 2021 |  | $ | 5,886
December 31, 2022 | ​ |  | 4,718
December 31, 2023 | ​ |  | 4,088
December 31, 2024 | ​ |  | 4,089
December 31, 2025 | ​ |  | 3,079
Thereafter | ​ |  | 4,600
Subject to amortization | ​ |  | 26,460
Trademarks | ​ |  | 736
Total intangible assets | ​ | $ | 27,196
​

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