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Significant Customers, Concentrations of Credit Risk, and Geographic Information (Tables) | 6 Months Ended
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Jun. 30, 2024
Significant Customers, Concentrations of Credit Risk and Geographic Information |
Schedule of net revenues from customers | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30, |
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023 |
Customer A |  | 24 | % | 23 | % | 20 | % | 27 | %
Customer B |  | 16 | % | 13 | % | 15 | % | * | %
Customer C | ​ | * | % | 11 | % | * | % | * | %
* Less than 10% of total net revenues
Schedule of net revenues by geographical area | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023
​ |  | (in thousands) | ​ | (in thousands)
United States | ​ | $ | 1,403 | ​ | $ | 1,947 | ​ | $ | 2,848 | ​ | $ | 4,100
Asia and Middle East | ​ |  | 478 | ​ | ​ | 1,128 | ​ | ​ | 1,207 | ​ | ​ | 1,954
Europe and other | ​ |  | 1,017 | ​ | ​ | 974 | ​ | ​ | 1,967 | ​ | ​ | 1,273
Revenue, net | ​ | $ | 2,898 | ​ | $ | 4,049 | ​ | $ | 6,022 | ​ | $ | 7,327
Schedule of assets by geographical area | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, |  | December 31,
​ |  | 2024 |  | 2023
​ |  | (in thousands)
United States | ​ | $ | 1,165 | ​ | $ | 733
Europe | ​ | ​ | 4,391 | ​ | ​ | 4,784
Asia | ​ |  | 390 | ​ | ​ | 217
Total long-lived assets | ​ | $ | 5,946 | ​ | $ | 5,734
​

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