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v3.23.1

Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2023
Intangible Assets |
Schedule of intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, 2023 |  | December 31, 2022 | ​
​ | ​ | Gross Carrying | ​ | Accumulated | ​ | Gross Carrying | ​ | Accumulated | ​
​ |  | Amount |  | Amortization |  | Amount |  | Amortization | ​
Intangible assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Licenses | ​ | $ | 149 | ​ | $ | (54) | ​ | $ | 149 | ​ | $ | (51) | ​
Patents | ​ | ​ | 72 | ​ | ​ | (2) | ​ | ​ | — | ​ | ​ | — | ​
Patents pending |  | ​ | 1,038 |  | ​ | — |  | ​ | 984 |  | ​ | — | ​
Trademarks | ​ | ​ | 9 | ​ | ​ | — | ​ | ​ | 9 | ​ | ​ | — | ​
Trademarks pending |  | ​ | 17 |  | ​ | — |  | ​ | 17 |  | ​ | — | ​
Total amortized intangible assets | ​ | $ | 1,285 | ​ | $ | (56) | ​ | $ | 1,159 | ​ | $ | (51) | ​
​
Schedule of amortization expense for intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, |
​ | ​ | 2023 |  | 2022 |
Amortization expense | ​ | $ | 5 | ​ | $ | 2 | ​
​

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