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Note 7 - Investments in Privately-Held Raw Material Companies (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Investment [Table Text Block] |
|  | Investment Balance as of |  |  |  |  |  |
|  | September 30, |  |  | December 31, |  | Accounting |  | Ownership |
Company |  | 2025 |  |  | 2024 |  | Method |  | Percentage |
Nanjing JinMei Gallium Co., Ltd. |  | $ | 592 |  |  | $ | 592 |  | Consolidated |  |  | ** 85.5 | %
ChaoYang JinMei Gallium Co., Ltd. |  |  | 1,820 |  |  |  | 1,820 |  | Consolidated |  |  | ** 85.5 | %
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd. |  |  | 1,346 |  |  |  | 1,346 |  | Consolidated |  |  | ** 85.5 | %
ChaoYang ShuoMei High Purity Semiconductor Materials Co., Ltd. |  |  | 3,122 |  |  |  | 3,122 |  | Consolidated |  |  | **** 75.0 | %
ChaoYang XinMei High Purity Semiconductor Materials Co., Ltd. |  |  | 7,331 |  |  |  | 7,331 |  | Consolidated |  |  | *** 58.5 | %
|  | $ | 14,211 |  |  | $ | 14,211 |  |  |  |  |  |
Beijing JiYa Semiconductor Material Co., Ltd. |  | $ | 4,305 |  |  | $ | 4,867 |  | Equity |  |  | 39 | %
Xiaoyi XingAn Gallium Co., Ltd. |  |  | 5,666 |  |  |  | 5,304 |  | Equity |  |  | ** 25 | %
ChaoYang KaiMei Quartz Co., Ltd. |  |  | 4,648 |  |  |  | 3,895 |  | Equity |  |  | ***** 40 | %
|  | $ | 14,619 |  |  | $ | 14,066 |  |  |  |  |  |
Emeishan Jia Mei High Purity Metals Co., Ltd. |  |  | 702 |  |  |  | 551 |  | Fair value |  |  | ****** 7.1 | %
|  | $ | 702 |  |  | $ | 551 |  |  |  |  |  |
Equity Method Investments, Summarized Income Information [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net revenue |  | $ | 8,870 |  |  | $ | 10,473 |  |  | $ | 24,591 |  |  | $ | 27,915 |
Gross profit |  | $ | 1,902 |  |  | $ | 4,876 |  |  | $ | 5,708 |  |  | $ | 12,966 |
Operating income |  | $ | 1,135 |  |  | $ | 4,135 |  |  | $ | 3,428 |  |  | $ | 11,541 |
Net income (loss) |  | $ | 817 |  |  | $ | 3,443 |  |  | $ | 1,591 |  |  | $ | 8,624 |

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