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Investments in Privately Held Raw Material Companies - Gain (Loss) on Sale and Remeasurement of Equity Method Investments (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 31, 2023 | Nov. 30, 2023 | May 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Investments in Privately-Held Raw Material Companies |  |  |  |  |
Fair value of the consideration received |  |  |  |  | $ 779,000
Gain (loss) recognized on sale |  |  |  |  | (166,000)
Fair value of the retained investment in Emeishan Jia Mei High Purity Metals Co., Ltd. |  |  |  | $ 551,000 | 551,000
Percentage of equity interest sold |  |  |  | 15.00% |
Emeishan Jia Mei High Purity Metals Co., Ltd Investment |  |  |  |  |
Investments in Privately-Held Raw Material Companies |  |  |  |  |
Foreign income tax withholding |  |  |  |  | 48,000
Carrying value |  |  |  |  | (252,000)
Gain (loss) recognized on sale |  |  | $ 575,000 |  | 575,000
Fair value of the retained investment in Emeishan Jia Mei High Purity Metals Co., Ltd. |  |  |  | $ 551,000 | 551,000
Carrying value of retained noncontrolling investment (10%) |  |  |  | (168,000) |
Gain on retained noncontrolling investment due to remeasurement (10%) |  |  |  | $ 383,000 |
Percentage of equity interest sold | 15.00% |  |  | 15.00% |
Percentage of ownership, cost method | 10.00% |  | 10.00% | 10.00% |
Percentage of ownership, equity method | 25.00% |  | 25.00% | 10.00% |
Donghai County Dongfang High Purity Electronic Materials Co., Ltd Investment |  |  |  |  |
Investments in Privately-Held Raw Material Companies |  |  |  |  |
Fair value of the consideration received |  | $ 600,000 |  |  | 585,000
Carrying value |  |  |  |  | (1,710,000)
Gain (loss) recognized on sale |  |  |  |  | $ (1,125,000)
Percentage of equity interest sold |  | 46.00% |  | 46.00% |
Percentage of ownership, cost method |  | 0.00% |  |  |
Percentage of ownership, equity method |  | 46.00% |  |  |

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