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Significant Customers, Concentrations of Credit Risk and Geographic Information | 12 Months Ended
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Dec. 31, 2025
Significant Customers, Concentrations of Credit Risk and Geographic Information |
Significant Customers, Concentrations of Credit Risk and Geographic Information | Note 8 – Significant Customers, Concentrations of Credit Risk and Geographic Information We manage and operate our business through one operating segment. Revenue from customers comprising at least 10% of total revenue are as follows: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, | ​
​ | ​ ​ ​ | 2025 | ​ ​ ​ | 2024 | ​
Customer A |  | 18 | % | 15 | %
Customer B |  | * | % | 12 | %
* less than 10% of total revenue ​ Revenue by geographic area are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ ​ ​ | 2025 | ​ ​ ​ | 2024
​ |  | (in thousands)
United States | ​ | $ | 4,998 | ​ | $ | 5,160
Asia and Middle East | ​ |  | 1,975 | ​ |  | 2,623
Europe and other | ​ |  | 4,917 | ​ |  | 3,896
Revenue | ​ | $ | 11,890 | ​ | $ | 11,679
​ Revenue by geographic area are based on the country of shipment destination. The geographic location of distributors and third-party manufacturing service providers may be different from the geographic location of the purchasers and/or ultimate end users. We provide credit only to creditworthy third parties who are subject to our credit verification procedures. Accounts receivable balances are monitored on an ongoing basis and accounts deemed to have credit risk are fully reserved. At December 31, 2025, one customer accounted for 23% of total accounts receivable. At December 31, 2024, one customer accounted for 41% of total accounts receivable. Our long-lived assets were geographically located as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | December 31, | ​ ​ ​ | December 31,
​ |  | 2025 |  | 2024
​ |  | (in thousands)
United States | ​ | $ | 1,122 | ​ | $ | 1,440
Europe | ​ | ​ | 3,973 | ​ | ​ | 4,446
Asia | ​ |  | 340 | ​ |  | 331
Total long-lived assets | ​ | $ | 5,435 | ​ | $ | 6,217
​

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