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Patents and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2022
Patents and Other Intangible Assets |
Patents and Other Intangible Assets | ​ Note 4 – Patents and Other Intangible Assets Patents and other intangible assets are summarized as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
(in thousands) |  | 2022 |  | 2021
Patents | ​ | ​ | ​ | ​ | ​ | ​
Patents pending | ​ | $ | 307 | ​ | $ | 439
Issued patents | ​ |  | 815 | ​ |  | 577
​ | ​ |  | 1,122 | ​ |  | 1,016
Trademarks | ​ |  | ​ | ​ |  | ​
Trademarks pending | ​ |  | 6 | ​ |  | 3
Registered trademarks | ​ |  | 95 | ​ |  | 94
​ | ​ |  | 101 | ​ |  | 97
Other | ​ |  | 8 | ​ |  | 8
​ | ​ |  | 1,231 | ​ |  | 1,121
Accumulated amortization | ​ |  | (433) | ​ |  | (322)
​ | ​ | $ | 798 | ​ | $ | 799
​ Future amortization expense associated with issued patents and registered trademarks as of December 31, 2022 is as follows: ​
​ | ​ | ​ | ​
(in thousands) | ​ | ​ | ​
2023 |  | $ | 147
2024 | ​ |  | 126
2025 | ​ |  | 96
2026 | ​ |  | 61
2027 | ​ |  | 39
Thereafter | ​ |  | 8
​ | ​ | $ | 477
​ The amortization life for patents ranges between three to five years, with trademark lives set at ten years. The Company does not amortize patents or trademarks classified as pending. ​ During the years ended December 31, 2022, and 2021, the Company assessed its patent and trademark assets. The Company also evaluated its strategic approach to the pursuit and protection of its intellectual property. It is the intent of the Company to continue to pursue intellectual property protection. ​ If the Company identifies certain assets where the intellectual property does not directly align with its core technology, the Company will impair the intangible asset and write-off the asset as an expense. During the years ended December 31, 2022 and 2021, the Company impaired $5 thousand and $385 thousand, respectively, of assets classified as pending patent costs. During the years ended December 31, 2022 and 2021, the Company impaired $14 thousand and zero, respectively, of assets classified as issued patents. During the years ended December 31, 2022 and 2021, the Company impaired zero and $36 thousand, respectively, of assets previously classified as pending trademark costs. These non-cash expenses for patents and trademarks are reflected in the operating results as Research and Development and General and Administrative expenses, respectively. ​ During the year ended December 31, 2021, for certain issued patents where the protected intellectual property was not directly aligned with current products, the Company accelerated the amortization by $50 thousand to reduce the financial net carrying value of capitalized patent costs and an additional $40 thousand in accelerated amortization to align trademark net capitalized costs with trademark registration dates.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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