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Investments in Privately-Held Raw Material Companies (Details)		1 Months Ended							3 Months Ended	12 Months Ended
	Jan. 25, 2021 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 ($)	Aug. 31, 2020 USD ($)	Mar. 31, 2023 USD ($) employee	Dec. 31, 2020 USD ($) employee	Dec. 31, 2022 USD ($)	Apr. 30, 2022 USD ($)	Jun. 30, 2021	Nov. 30, 2020	Jul. 31, 2020
Summary of investments
Investments, equity method									$ 16,546,000		$ 14,607,000
Other assets
Summary of investments
Investments, equity method									16,500,000		14,600,000
Donghai County Dongfang High Purity Electronic Materials Co., Ltd Investment
Summary of investments
Investments, equity method									$ 1,876,000		1,887,000
Percentage of ownership, equity method									46.00%
Beijing JiYa Semiconductor Material Co., Ltd Investment
Summary of investments
Investments, equity method									$ 6,559,000		6,381,000
Percentage of ownership, equity method									39.00%
Dividends received			$ 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									$ 6,007,000		5,094,000
Percentage of ownership, equity method									25.00%
Dividends received				$ 1,500,000
ChaoYang KaiMei Quartz Co., Ltd
Summary of investments
Investments, equity method									$ 1,665,000		827,000	$ 3,000,000.0
Percentage of ownership, equity method									40.00%			40.00%
Emeishan Jia Mei High Purity Metals Co., Ltd Investment
Summary of investments
Investments, equity method									$ 439,000		418,000
Percentage of ownership, equity method									25.00%
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%
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									$ 12,585,000		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									$ 1,496,000		1,000,000
Increase in redeemable noncontrolling interests		$ 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%