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Investments in Privately Held Raw Material Companies (Details) - USD ($)			1 Months Ended										3 Months Ended	12 Months Ended
	May 31, 2023	Jan. 25, 2021	Nov. 30, 2024	May 31, 2024	Nov. 30, 2023	May 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Aug. 31, 2022	Jul. 31, 2022	Jun. 30, 2022	Jan. 31, 2021	Dec. 31, 2020	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020	Sep. 30, 2023	Aug. 31, 2023	Jul. 31, 2023	Sep. 30, 2022	Apr. 30, 2022	Jun. 30, 2021
Summary of investments
Investments, equity method														$ 14,066,000	$ 12,476,000
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														$ 2,396,000	4,316,000	$ 1,608,000
Other Assets
Summary of investments
Investments, equity method														14,100,000	12,500,000
Beijing JiYa Semiconductor Material Co., Ltd Investment
Summary of investments
Dividends received			$ 300,000
Xilingol Tongli Germanium Co. Ltd Investment
Summary of investments
Dividends received				$ 2,100,000
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%					25.00%								10.00%
Percentage of ownership, cost method	10.00%					10.00%								10.00%
Percentage of equity interest sold	15.00%													15.00%
Proceeds from sale of equity method investments	$ 10					$ 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														$ 4,867,000	3,806,000
Percentage of ownership, equity method														39.00%
Dividends received					$ 500,000		$ 2,000,000		$ 100,000
Xiaoyi XingAn Gallium Co., Ltd.
Summary of investments
Investments, equity method														$ 5,304,000	5,516,000
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								$ 900,000						$ 3,895,000	3,154,000			$ 2,300,000	$ 600,000	$ 600,000		$ 3,000,000
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%
PRC subsidiaries and PRC raw material joint ventures
Summary of investments
Dividends received														$ 2,400,000	4,300,000	$ 2,900,000
Dividends paid														$ 0	0
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																	0.0038%
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
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						$ 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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