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INTANGIBLES | 12 Months Ended
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Dec. 31, 2022
INTANGIBLES [Abstract] |
INTANGIBLES | 4. INTANGIBLES Intangible assets consist of the following:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Dollars in Thousands
​ | ​ | December 31, 2022
​ |  | ​ | ​ |  | Accumulated |  | Net Book
​ | ​ | Cost | ​ | Amortization | ​ | Value
Technology | ​ | $ | 18,990 | ​ | $ | 5,222 | ​ | $ | 13,768
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Dollars in Thousands
​ | ​ | December 31, 2021
​ |  | ​ | ​ |  | Accumulated |  | Net Book
​ | ​ | Cost | ​ | Amortization | ​ | Value
Technology | ​ | $ | 18,990 | ​ | $ | 4,273 | ​ | $ | 14,717
​
​ | ​ | ​ | ​
​ |  | Estimated Useful Life | ​
Technology |  | 20 | years
​ Amortization expense for intangible assets was $1.0 million during the years ended December 31, 2022 and 2021, respectively. Amortization expense for intangible assets is expected to be $1.0 million for each of the years ending December 31, 2023, 2024, 2025, 2026 and 2027, 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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