Investments in Privately-Held Raw Material Companies - Gain (loss) on sale and remeasurement of equity method investments (Details) - USD ($)	1 Months Ended	9 Months Ended
May 31, 2023	Sep. 30, 2023
Schedule of Equity Method Investments [Line Items]
Fair value of the retained investment in Emeishan Jia Mei High Purity Metals Co., Ltd.		$ 551,000
Percentage of equity interest sold		15.00%
Emeishan Jia Mei High Purity Metals Co., Ltd Investment
Schedule of Equity Method Investments [Line Items]
Fair value of the consideration received		$ 779,000
Foreign income tax withholding		48,000
Carrying value of 15% of Emeishan Jia Mei High Purity Metals Co., Ltd.		(252,000)
Gain recognized on sale of 15% of Emeishan Jia Mei High Purity Metals Co., Ltd.	$ 575,000	575,000
Fair value of the retained investment in Emeishan Jia Mei High Purity Metals Co., Ltd.		551,000
Carrying value of retained noncontrolling investment (10%)		(168,000)
Gain on retained noncontrolling investment due to remeasurement (10%)		$ 383,000
Percentage of equity interest sold	15.00%	15.00%
Percentage of ownership, cost method	10.00%	10.00%

Amount of the entity's equity method investment which has been retained.

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The fair value of consideration for sale of equity method investments.

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Amount of gain (loss) on retained equity method investment re measurement.

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Percentage of equity interest sold.

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Amount of gain (loss) on sale or disposal of an equity method investment.

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Amount of the entity's equity method investment which has been sold.

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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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