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Note 3 - Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Three months ended March 31, |
|  |  |  |  |  | % of |  |  |  |  |  |  | % of |
​ |  | 2025 |  |  | Revenue |  |  | 2024 |  |  | Revenue |
CATV |  | $ | 64,501 |  |  |  | 64.6 | % |  | $ | 8,736 |  |  |  | 21.5 | %
Data Center |  |  | 32,049 |  |  |  | 32.1 | % |  |  | 28,986 |  |  |  | 71.2 | %
Telecom |  |  | 2,937 |  |  |  | 2.9 | % |  |  | 2,269 |  |  |  | 5.6 | %
FTTH |  |  | — |  |  |  | 0.0 | % |  |  | — |  |  |  | 0.0 | %
Other |  |  | 372 |  |  |  | 0.4 | % |  |  | 682 |  |  |  | 1.7 | %
Total Revenue |  | $ | 99,859 |  |  |  | 100.0 | % |  | $ | 40,673 |  |  |  | 100.0 | %
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
|  | Three months ended March 31, |
|  | 2025 |  |  | 2024 |
Unearned revenue, beginning of period |  | $ | — |  |  | $ | 1,803 |
Additional unearned revenue |  |  | — |  |  |  | — |
Revenue recognized |  |  | — |  |  |  | 114 |
Unearned revenue, end of period |  | $ | — |  |  | $ | 1,689 |
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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