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Investments in Privately-Held Raw Material Companies (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 25, 2021 | May 31, 2024 | Nov. 30, 2023 | Aug. 31, 2023 | May 31, 2023 | Apr. 30, 2023 | Jan. 31, 2023 | Aug. 31, 2022 | Jul. 31, 2022 | Jun. 30, 2022 | Jan. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2020 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2020 | Sep. 30, 2023 | Jul. 31, 2023 | Apr. 30, 2022 | Jun. 30, 2021
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  |  | $ 12,476,000 |  | $ 11,949,000 |  |  |  |  |  |
Investments, cost method |  |  |  |  |  |  |  |  |  |  |  | 551,000 |  | 551,000 |  |  |  |  |  |
Percentage of equity interest sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |
Proceeds from sale of equity method investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 827,000 |  |  |  |  |
Dividend received |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,063,000 | $ 3,666,000 |  |  |  |  |
Other Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  |  | 12,500,000 |  | 11,900,000 |  |  |  |  |  |
Emeishan Jia Mei High Purity Metals Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, cost method |  |  |  |  |  |  |  |  |  |  |  | 551,000 |  | $ 551,000 |  |  |  |  |  |
Percentage of ownership, equity method |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |
Percentage of ownership, cost method |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |
Percentage of equity interest sold |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |
Proceeds from sale of equity method investments |  |  |  |  | $ 827,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |
Beijing JiYa Semiconductor Material Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  |  | 3,806,000 |  | $ 4,400,000 |  |  |  |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  |  |  |  | 39.00% |  |  |  |  |  |
Dividends received |  |  | $ 500,000 |  |  | $ 2,000,000.0 |  | $ 125,000 |  |  |  |  |  |  |  |  |  |  |  |
Xiaoyi XingAn Gallium Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  |  | 5,516,000 |  | $ 4,233,000 |  |  |  |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |
Dividends received |  | $ 2,100,000 | $ 1,800,000 |  |  | $ 1,800,000 |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |  |
ChaoYang KaiMei Quartz Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  | $ 600,000 |  |  | $ 900,000 |  |  |  |  | $ 3,154,000 |  | $ 3,316,000 |  |  | $ 2,300,000 | $ 600,000 | $ 3,000,000.0 |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  | 40.00% |  |  |  |  | 40.00% |
Donghai County Dongfang High Purity Electronic Materials Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, equity method |  |  | 46.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, cost method |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interest sold |  |  | 46.00% |  |  |  |  |  |  |  |  | 46.00% |  |  |  |  |  |  |  |
Nanjing JinMei Gallium Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding shares |  |  |  |  |  |  |  |  |  |  |  |  | 8.50% |  |  | 8.50% |  |  |  |
Nanjing JinMei Gallium Co., Ltd Investment | Beijing JiYa Semiconductor Material Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  |  |  |  | 39.00% |  |  |  |  |  |
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding shares |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% |  |  | 33.00% |  |  |  |
Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.50%
Percentage of outstanding shares | 7.28% |  |  |  |  |  |  |  |  |  |  |  |  | 14.50% |  |  |  |  |  |
Private equity ownership percentage | 7.28% |  |  |  |  |  |  |  |  |  |  |  |  | 14.50% |  |  |  |  |  |
Percentage of key managers and contributors purchased |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.40% |  |  |  |
Increase in redeemable noncontrolling interests |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  | $ 48,100,000 |  |  | $ 48,100,000 |  |  |  |
Investments, government approved | $ 49,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nanjing JinMei Gallium Co., Ltd | Nanjing JinMei Gallium Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private equity ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.38% |  |  |  |
Nanjing JinMei Gallium Co., Ltd | Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private equity ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.38% |  |  |  |
Beijing Boyu Semiconductor Vessel Craftwork Technology Co Ltd | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private equity ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.59% |  |  |  |
Beijing Boyu Semiconductor Vessel Craftwork Technology Co Ltd | Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private equity ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.59% |  |  |  |
Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  |  | $ 14,211,000 |  | $ 14,211,000 |  |  |  |  |  |
Nanjing JinMei Gallium Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  |  | 592,000 |  | $ 592,000 |  |  |  |  |  |
Nanjing JinMei Gallium Co., Ltd Investment | Nanjing JinMei Gallium Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.50% |  |  |  |  |  |
ChaoYang JinMei Gallium Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  |  | 1,820,000 |  | $ 1,820,000 |  |  |  |  |  |
ChaoYang JinMei Gallium Co., Ltd. | ChaoYang JinMei Gallium Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.50% |  |  |  |  |  |
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  |  | 1,346,000 |  | $ 1,346,000 |  |  |  |  |  |
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment | Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.50% |  |  |  |  |  |
ChaoYang ShuoMei High Purity Semiconductor Materials Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  |  | 3,122,000 |  | $ 3,122,000 |  |  |  |  |  |
Increase in redeemable noncontrolling interests |  |  |  | $ 44,000 | $ 75,000 |  | $ 36,000 |  |  |  |  |  |  |  |  |  |  |  |  |
ChaoYang ShuoMei High Purity Semiconductor Materials Co., Ltd. | ChaoYang ShuoMei High Purity Semiconductor Materials Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method |  |  |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  |  |  |
Chao Yang XinMei High Purity Semiconductor Materials Co. Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  |  | $ 7,331,000 |  | $ 7,331,000 |  |  |  |  |  |
Chao Yang XinMei High Purity Semiconductor Materials Co. Ltd. | Chao Yang XinMei High Purity Semiconductor Materials Co. Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method |  |  |  |  |  |  |  |  |  |  |  |  |  | 58.50% |  |  |  |  |  |

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