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Investments in Privately-Held Raw Material Companies (Details) |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |  |
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Jan. 25, 2021 USD ($) | May 31, 2023 USD ($) | Apr. 30, 2023 USD ($) | Jan. 31, 2023 USD ($) | Aug. 31, 2022 USD ($) | Jul. 31, 2022 USD ($) | Jun. 30, 2022 USD ($) | Jan. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Aug. 31, 2020 USD ($) | Jun. 30, 2023 USD ($) employee | Dec. 31, 2020 USD ($) employee | Aug. 31, 2023 | Dec. 31, 2022 USD ($) | Apr. 30, 2022 USD ($) | Jun. 30, 2021 | Nov. 30, 2020 | Jul. 31, 2020
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  | $ 11,789,000 |  |  | $ 14,607,000 |  |  |  |
Investment, cost method |  |  |  |  |  |  |  |  |  |  | $ 551,000 |  |  |  |  |  |  |
Percentage of equity interest sold |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |  |
Proceeds from sale of equity securities |  |  |  |  |  |  |  |  |  |  | $ 827,000 |  |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  | 11,800,000 |  |  | 14,600,000 |  |  |  |
Donghai County Dongfang High Purity Electronic Materials Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  | $ 1,749,000 |  |  | 1,887,000 |  |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  | 46.00% |  |  |  |  |  |  |
Beijing JiYa Semiconductor Material Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  | $ 3,884,000 |  |  | 6,381,000 |  |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  | 39.00% |  |  |  |  |  |  |
Dividends received |  |  | $ 1,800,000 |  | $ 125,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |
Xiaoyi XingAn Gallium Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  | $ 4,616,000 |  |  | 5,094,000 |  |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |
Dividends received |  |  | $ 1,800,000 |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |
ChaoYang KaiMei Quartz Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  | $ 1,540,000 |  |  | 827,000 | $ 3,000,000.0 |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  | 40.00% |  | 40.00% |  | 40.00% |  |  |
Emeishan Jia Mei High Purity Metals Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, equity method |  |  |  |  |  |  |  |  |  |  |  |  |  | 418,000 |  |  |  |
Investment, cost method |  |  |  |  |  |  |  |  |  |  | $ 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 securities |  | $ 827,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain from share sale |  | 575,000 |  |  |  |  |  |  |  |  | $ 575,000 |  |  |  |  |  |  |
Gain from fair value adjustment |  |  |  |  |  |  |  |  |  |  | $ 383,000 |  |  |  |  |  |  |
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% |  |  |  |  |  |  |
Nanjing JinMei Gallium Co., Ltd Investment | Emeishan Jia Mei High Purity Metals Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, equity method |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method (in hundredths) |  |  |  |  |  |  |  |  | 67.00% |  |  | 67.00% |  |  |  |  | 63.00% |
Percentage of outstanding shares |  |  |  |  |  |  |  |  | 33.00% |  |  | 33.00% |  |  |  |  |  |
Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method (in hundredths) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 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 |  |  |  |  |  |
Investments, government approved | $ 49,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nanjing JinMei Gallium Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of new board representatives | employee |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of new board representatives | employee |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Beijing Boyu Semiconductor Vessel Craftwork Technology Co Ltd | Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private equity ownership percentage |  |  |  |  |  |  |  |  |  |  |  | 7.59% |  |  |  |  |  |
Majority-Owned Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  | $ 13,612,000 |  |  | 12,089,000 |  |  |  |
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 (in hundredths) |  |  |  |  |  |  |  |  |  |  | 85.50% |  |  |  |  |  |  |
ChaoYang Jin Mei Gallium Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  | $ 1,820,000 |  |  | 1,820,000 |  |  |  |
ChaoYang Jin Mei Gallium Co., Ltd | ChaoYang Jin Mei Gallium Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, consolidated method (in hundredths) |  |  |  |  |  |  |  |  |  | 91.50% | 85.50% |  |  |  |  |  |  | 100.00%
Percentage of ownership interest sold |  |  |  |  |  |  |  |  |  | 8.50% |  |  |  |  |  |  |  |
Proceeds from sale of previously consolidated subsidiary shares |  |  |  |  |  |  |  |  |  | $ 396,000 |  |  |  |  |  |  |  |
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  | $ 1,346,000 |  |  | 1,346,000 |  |  |  |
Additional percentage of ownership, consolidated method |  |  |  |  |  |  |  |  | 4 |  |  | 4 |  |  |  |  |  |
Purchase of subsidiary shares from noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  | $ 1,600,000 |  |  |  |  |  |
Gain (loss) from equity transaction |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |
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 (in hundredths) |  |  |  |  |  |  |  |  |  |  | 85.50% |  |  |  |  |  |  |
ChaoYang ShuoMei High Purity Semiconductor Materials Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments, consolidated method |  |  |  |  |  |  |  |  |  |  | $ 2,523,000 |  |  | 1,000,000 |  |  |  |
Increase in redeemable noncontrolling interests |  | $ 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 (in hundredths) |  |  |  |  |  |  |  |  |  |  | 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 (in hundredths) |  |  |  |  |  |  |  |  |  |  | 58.50% |  |  |  |  |  |  |

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