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Investments in Privately-Held Raw Material Companies (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 25, 2021
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
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2020
Sep. 30, 2023
Jul. 31, 2023
Apr. 30, 2022
Jun. 30, 2021
Summary of investments                                  
Investments, equity method                     $ 13,198,000 $ 12,476,000          
Investments, cost method                     551,000 551,000          
Other Assets                                  
Summary of investments                                  
Investments, equity method                     13,200,000 12,500,000          
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                     $ 4,105,000 3,806,000          
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                     $ 5,995,000 5,516,000          
Percentage of ownership, equity method                     25.00%            
Dividends received   $ 1,800,000     $ 1,800,000     $ 1,500,000                  
ChaoYang KaiMei Quartz Co., Ltd                                  
Summary of investments                                  
Investments, equity method     $ 600,000     $ 900,000         $ 3,098,000 $ 3,154,000   $ 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%        
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%        
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        
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%        
Majority-Owned 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%