Amount of return or dividends on equity method investment.

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n/a

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No definition available.

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The amount of investment of redeemable non controlling interests approved by government.

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No definition available.

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Total investments in (A) entities in which the entity has significant influence and control, (B) joint ventures that are consolidated, but (C) entities in which local management manage daily operations, (D) entities that not required additional investment of financial support from the parent entity.

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No definition available.

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Percentage of equity interest sold.

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No definition available.

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The percentage of equity issued on conversion of noncontrolling interests.

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No definition available.

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- Definition

The percentage of equity purchased by employees, key managers and Contributors.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Percentage of ownership of equity interest excluding interest in entity that is consolidated and equity method investee.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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No definition available.

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- Definition

Includes other investments and securities that are not at fair value as of the balance sheet date and those that are not accounted for under the equity method.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
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Dividends received on equity and other investments during the current period.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
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- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Value of new stock classified as temporary equity issued during the period.

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No definition available.

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Investments in Privately-Held Raw Material Companies (Details) - USD ($)		1 Months Ended										3 Months Ended		9 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	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2020	Jul. 31, 2023	Apr. 30, 2022	Jun. 30, 2021
Summary of investments
Investments, equity method												$ 12,476,000		$ 13,533,000
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		13,500,000
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												3,806,000		$ 4,681,000
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		$ 4,969,000
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		$ 3,883,000	$ 2,300,000		$ 600,000	$ 3,000,000.0
Percentage of ownership, equity method														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%
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				$ 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%