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INTANGIBLES | 12 Months Ended
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Dec. 31, 2020
INTANGIBLES [Abstract] |
INTANGIBLES | 4. INTANGIBLES Intangible assets consist of the following:
|  | Dollars in Thousands
|  | December 31, 2020
|  |  |  |  | Accumulated |  | Impairment |  | Net Book
|  | Cost |  | Amortization |  | Charge |  | Value
Technology |  | $ | 18,990 |  | $ | 3,323 |  | $ | — |  | $ | 15,667
Customer relationships |  |  | 250 |  |  | 250 |  |  | — |  |  | —
Backlog |  |  | 200 |  |  | 200 |  |  | — |  |  | —
Covenants not to compete |  |  | 30 |  |  | 30 |  |  | — |  |  | —
Trademark |  |  | 40 |  |  | 40 |  |  | — |  |  | —
|  | $ | 19,510 |  | $ | 3,843 |  | $ | — |  | $ | 15,667
|  | Dollars in Thousands
|  | December 31, 2019
|  |  |  |  | Accumulated |  | Impairment |  | Net Book
|  | Cost |  | Amortization |  | Charge |  | Value
Technology |  | $ | 18,990 |  | $ | 2,374 |  | $ | — |  | $ | 16,616
Customer relationships |  |  | 250 |  |  | 208 |  |  | — |  |  | 42
Backlog |  |  | 200 |  |  | 200 |  |  | — |  |  | —
Covenants not to compete |  |  | 30 |  |  | 30 |  |  | — |  |  | —
Trademark |  |  | 40 |  |  | 40 |  |  | — |  |  | —
IPR&D |  |  | 1,590 |  |  | — |  |  | 1,590 |  |  | —
|  | $ | 21,100 |  | $ | 2,852 |  | $ | 1,590 |  | $ | 16,658
|  | Estimated Useful Life |
Technology |  | 20 | years
Customer relationships |  | 3 | years
Backlog |  | 1 | year
Covenants not to compete |  | 1 | year
Trademark |  | 2 | years
Our IPR&D projects were accounted for as indefinite-lived intangible assets and subject to impairment testing. During 2019, the Company reviewed its IPR&D for impairment and determined that it was more likely than not that the IPR&D was fully impaired, resulting in an impairment charge of $1.6 million in 2019. For the year ended December 31, 2020, there was no impairment of IPR&D. Amortization expense for intangible assets was $1.0 million during the years ended December 31, 2020 and 2019. Amortization expense for intangible assets is expected to be $0.9 million for each of the years ending December 31, 2021, 2022, 2023, 2024 and 2025, respectively.

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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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