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Details of Certain Financial Statement Components (Tables) | 12 Months Ended
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Dec. 31, 2022
Details of Certain Financial Statement Components |
Schedule of inventories | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2022 |  | 2021
Inventories |  | (in thousands)
Raw materials |  | $ | 1,632 |  | $ | 447
Work-in-process | ​ | ​ | 192 | ​ | ​ | 209
Finished goods | ​ | ​ | 285 | ​ | ​ | 158
Total inventories |  | $ | 2,112 |  | $ | 814
​
Schedule of property, plant and equipment, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2022 |  | 2021
Property, plant and equipment, net | ​ | (in thousands)
Furniture, machinery and equipment | ​ | $ | 1,688 | ​ | $ | 1,696
Leasehold improvements | ​ |  | 417 | ​ |  | 444
​ | ​ |  | 2,105 | ​ |  | 2,140
Less: accumulated depreciation | ​ |  | (1,921) | ​ |  | (1,802)
Total property, plant and equipment, net | ​ | $ | 184 | ​ | $ | 338
​
Schedule of intangible assets, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2022 |  | 2021
Intangible assets, net | ​ | (in thousands)
Patents and trademarks | ​ | $ | 658 | ​ | $ | 658
Less: accumulated amortization | ​ |  | (582) | ​ |  | (527)
Total intangibles, net | ​ | $ | 76 | ​ | $ | 131
​
Schedule of future amortization on existing intangibles | ​
​ | ​ | ​ | ​
Years ending December 31, |  | (in thousands)
2023 | ​ | $ | 42
2024 | ​ |  | 27
2025 | ​ |  | 7
2026 | ​ | ​ | —
2027 | ​ | ​ | —
Thereafter | ​ |  | —
​ | ​ | $ | 76
​
Schedule of accrued liabilities | ​

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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