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Significant Customers, Concentrations of Credit Risk, and Geographic Information (Tables) | 3 Months Ended
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Mar. 31, 2024
Significant Customers, Concentrations of Credit Risk and Geographic Information |
Schedule of net revenues from customers | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended March 31, | ​
​ |  | 2024 |  | 2023 |
Customer A |  | 16 | % | 32 | %
Customer B |  | 17 | % | * | %
* Less than 10% of total net revenues
Schedule of net revenues by geographical area | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended March 31,
​ |  | 2024 |  | 2023
​ |  | (in thousands)
United States | ​ | $ | 1,445 | ​ | $ | 2,153
Asia and Middle East | ​ |  | 729 | ​ |  | 826
Europe and other | ​ |  | 950 | ​ |  | 299
Revenue, net | ​ | $ | 3,124 | ​ | $ | 3,278
Schedule of assets by geographical area | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, |  | December 31,
​ |  | 2024 |  | 2023
​ |  | (in thousands)
United States | ​ | $ | 674 | ​ | $ | 733
Europe | ​ | ​ | 4,565 | ​ | ​ | 4,784
Asia | ​ |  | 182 | ​ |  | 217
Total long-lived assets | ​ | $ | 5,421 | ​ | $ | 5,734
​

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