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Note 3 - Revenue Recognition (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three months ended June 30, |
|  |  |  |  |  | % of |  |  |  |  |  |  | % of |
​ |  | 2025 |  |  | Revenue |  |  | 2024 |  |  | Revenue |
CATV |  | $ | 56,019 |  |  |  | 54.4 | % |  | $ | 5,818 |  |  |  | 13.4 | %
Data Center |  |  | 44,791 |  |  |  | 43.5 | % |  |  | 34,352 |  |  |  | 79.4 | %
Telecom |  |  | 1,940 |  |  |  | 1.9 | % |  |  | 2,379 |  |  |  | 5.5 | %
Other |  |  | 202 |  |  |  | 0.2 | % |  |  | 721 |  |  |  | 1.7 | %
Total Revenue |  | $ | 102,952 |  |  |  | 100.0 | % |  | $ | 43,270 |  |  |  | 100.0 | %
|  | Six months ended June 30, |
​ |  |  |  |  |  | % of |  |  |  |  |  |  | % of |
​ |  | 2025 |  |  | Revenue |  |  | 2024 |  |  | Revenue |
CATV |  | $ | 120,520 |  |  |  | 59.4 | % |  | $ | 14,554 |  |  |  | 17.3 | %
Data Center |  |  | 76,841 |  |  |  | 37.9 | % |  |  | 63,338 |  |  |  | 75.5 | %
Telecom |  |  | 4,876 |  |  |  | 2.4 | % |  |  | 4,648 |  |  |  | 5.5 | %
Other |  |  | 574 |  |  |  | 0.3 | % |  |  | 1,403 |  |  |  | 1.7 | %
Total Revenue |  | $ | 202,811 |  |  |  | 100.0 | % |  | $ | 83,943 |  |  |  | 100.0 | %
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | Three months ended June 30, |  |  | Six months ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Unearned revenue, beginning of period |  | $ | — |  |  | $ | 1,689 |  |  | $ | — |  |  | $ | 1,803 |
Additional unearned revenue |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Revenue recognized |  |  | — |  |  |  | 119 |  |  |  | — |  |  |  | 233 |
Unearned revenue, end of period |  | $ | — |  |  | $ | 1,570 |  |  | $ | — |  |  | $ | 1,570 |
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
|  | At Grant Date |
Expected volatility |  |  | 80.00 | %
Weighted-average expected term (in years) |  |  | 10 |
Risk-free interest rate |  |  | 4.23 | %
Dividend yield |  |  | — | %
Fair value per ordinary share at grant date |  | $ | 15.87 |

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