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Details of Certain Financial Statement Components (Tables) | 3 Months Ended
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Mar. 31, 2024
Details of Certain Financial Statement Components |
Schedule of inventories | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2024 |  | 2023
Inventories |  | (in thousands)
Raw materials |  | $ | 2,049 |  | $ | 1,986
Work-in-process | ​ | ​ | 225 | ​ | ​ | 232
Finished goods | ​ | ​ | 296 | ​ | ​ | 258
Total inventories |  | $ | 2,570 |  | $ | 2,476
Schedule of property, plant and equipment, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2024 |  | 2023
Property, plant and equipment, net | ​ | (in thousands)
Furniture, machinery and equipment | ​ | $ | 2,014 | ​ | $ | 2,009
Leasehold improvements | ​ |  | 406 | ​ |  | 412
​ | ​ |  | 2,420 | ​ |  | 2,421
Less: accumulated depreciation | ​ |  | (2,131) | ​ |  | (2,108)
Total property, plant and equipment, net | ​ | $ | 289 | ​ | $ | 313
Schedule of intangible assets, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Average | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortization | ​ | March 31, | ​ | December 31,
​ |  | Period |  | 2024 |  | 2023
Intangible assets, net | ​ | ​ | ​ | (in thousands)
Patents, tradenames, and trademarks | ​ | 5 years | ​ | $ | 932 | ​ | $ | 935
Developed technology | ​ | 3.5 years | ​ | ​ | 538 | ​ | ​ | 543
Customer relationships | ​ | 6 years | ​ | ​ | 1,433 | ​ | ​ | 1,449
Non-compete agreements | ​ | 4 years | ​ | ​ | 920 | ​ | ​ | 930
Order backlog | ​ | 0.5 years | ​ | ​ | 22 | ​ | ​ | 22
In-process research and development | ​ | Indefinite | ​ | ​ | 29 | ​ | ​ | 29
​ | ​ | ​ | ​ | ​ | 3,874 | ​ | ​ | 3,908
Less: accumulated amortization | ​ | ​ | ​ |  | (1,437) | ​ |  | (1,254)
Total intangible assets, net | ​ | ​ | ​ | $ | 2,437 | ​ | $ | 2,654
Schedule of future amortization on existing intangibles | ​
​ | ​ | ​ | ​
Years ending December 31, |  | (in thousands)
2024 (remainder of year) | ​ | $ | 559
2025 | ​ |  | 663
2026 | ​ |  | 539
2027 | ​ |  | 332
2028 | ​ |  | 261
Thereafter | ​ | ​ | 83
​ | ​ | $ | 2,437
Schedule of changes in the carrying amount of goodwill | ​
​ | ​ | ​ | ​
​ |  | ​ | (in thousands)
Balance as of January 1, 2024 | ​ | $ | 2,461
Adjustment to goodwill, foreign currency exchange rate changes | ​ |  | (26)
Balance as of March 31, 2024 | ​ | $ | 2,435
​
​ | ​ | ​ | ​
​ |  | ​ | (in thousands)
Balance as of January 1, 2023 |  | $ | 650
Goodwill acquired in acquisition of Calman (before December 2023 adjustment to allocation) | ​ | ​ | 4,052
Adjustment to goodwill, foreign currency exchange rate changes | ​ | ​ | 154
Balance as of March 31, 2023 |  | $ | 4,856
Schedule of accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2024 |  | 2023
Accrued liabilities | ​ | (in thousands)
Accrued wages and benefits | ​ | $ | 146 | ​ | $ | 204
Accrued vacation | ​ |  | 190 | ​ |  | 185
Other accrued liabilities | ​ |  | 80 | ​ |  | 103
Total accrued liabilities | ​ | $ | 416 | ​ | $ | 492
​

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