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Intangible Assets | 6 Months Ended
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Jun. 30, 2021
Intangible Assets |
Intangible Assets | Note 6 – Intangible Assets Intangible asset activity for the three and six months ended June 30, 2021 is detailed in the following table. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​
in thousands |  | Acquired Technology |  | Customer Relationships |  | Other |  | Total Intangible Assets
Net balance at December 31, 2020 | ​ | $ | 2,277 | ​ | $ | 23,200 | ​ | $ | 1,719 | ​ | $ | 27,196
Additions | ​ |  | 2 | ​ | ​ | — | ​ | ​ | 14 | ​ |  | 16
Disposals | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (21) | ​ | ​ | (21)
Net foreign currency translation | ​ |  | 31 | ​ | ​ | 106 | ​ | ​ | 6 | ​ |  | 143
Amortization expense | ​ |  | (778) | ​ | ​ | (2,004) | ​ | ​ | (325) | ​ |  | (3,107)
Net balance at June 30, 2021 | ​ | $ | 1,532 | ​ | $ | 21,302 | ​ | $ | 1,393 | ​ | $ | 24,227
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
June 30, 2021 balance at cost | ​ | $ | 43,436 | ​ | $ | 40,121 | ​ | $ | 13,559 | ​ | $ | 97,116
Accumulated amortization | ​ |  | (41,904) | ​ |  | (18,819) | ​ |  | (12,166) | ​ |  | (72,889)
Net balance at June 30, 2021 | ​ | $ | 1,532 | ​ | $ | 21,302 | ​ | $ | 1,393 | ​ | $ | 24,227
​ Certain intangible assets are denominated in functional currencies besides the U.S. dollar and are subject to currency fluctuations. No impairment of intangible assets was recorded during the three months ended June 30, 2021 or June 30, 2020.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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