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Note 7 - Investments in Privately-Held Raw Material Companies (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Investment [Table Text Block] |
|  | Investment Balance as of |  |  |  |  |  |
|  | June 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. |  | $ | 4,177 |  |  | $ | 4,867 |  | Equity |  |  | 39 | %
Xiaoyi XingAn Gallium Co., Ltd. |  |  | 5,515 |  |  |  | 5,304 |  | Equity |  |  | ** 25 | %
ChaoYang KaiMei Quartz Co., Ltd. |  |  | 4,638 |  |  |  | 3,895 |  | Equity |  |  | ***** 40 | %
|  | $ | 14,330 |  |  | $ | 14,066 |  |  |  |  |  |
Emeishan Jia Mei High Purity Metals Co., Ltd. |  |  | 406 |  |  |  | 551 |  | Fair value |  |  | ****** 10 | %
|  | $ | 406 |  |  | $ | 551 |  |  |  |  |  |
Equity Method Investments, Summarized Income Information [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net revenue |  | $ | 7,064 |  |  | $ | 9,338 |  |  | $ | 15,722 |  |  | $ | 17,442 |
Gross profit |  | $ | 1,862 |  |  | $ | 4,161 |  |  | $ | 3,806 |  |  | $ | 8,090 |
Operating income |  | $ | 1,010 |  |  | $ | 4,035 |  |  | $ | 2,292 |  |  | $ | 7,406 |
Net income (loss) |  | $ | (197 | ) |  | $ | 2,044 |  |  | $ | 774 |  |  | $ | 5,182 |

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