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Related Party Transactions (Details)			1 Months Ended					3 Months Ended			6 Months Ended		12 Months Ended
Related Party Transactions (Details)	Dec. 25, 2020 USD ($)	Nov. 02, 2017 USD ($)	Mar. 31, 2020 USD ($)	May 31, 2019 USD ($)	Nov. 30, 2017 USD ($)	Jul. 31, 2017 USD ($) installment	Apr. 30, 2016 USD ($)	Jun. 30, 2021 USD ($) ft²	Jun. 30, 2020 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2021 USD ($) ft²	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Related Party Transaction [Line Items]
Area of leased property (in square feet) \| ft²								19,467			19,467
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment
Related Party Transaction [Line Items]
Additional Minority Ownership Percentage by Parent													4
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent													$ 1,600,000
Related party loan \| Beijing BoYu Semiconductor Vessel Craftwork Technology Co
Related Party Transaction [Line Items]
Revenue from related parties								$ 45,000			$ 50,000	$ 300,000
Equity investment entity \| Raw materials sales to related party \| Accounts receivable \| Beijing JiYa Semiconductor Material Co., Ltd
Related Party Transaction [Line Items]
Amounts receivable from related party								0			0		0
Equity investment entity \| Raw material agency sales agreement \| Other income (expense), net [Member] \| Nanjing JinMei Gallium Co., Ltd
Related Party Transaction [Line Items]
Other income from related party								0	$ 0		0	$ 0
Donghai County Dongfang High Purity Electronic Materials Co., Ltd \| Raw materials purchases from related party \| Accounts payable \| Beijing Tongmei Xtal Technology
Related Party Transaction [Line Items]
Amount payable to related party								110,000			110,000		0
Emei Shan Jiamei Materials Co., Ltd \| Raw materials purchases from related party \| Accounts payable \| Beijing Tongmei Xtal Technology
Related Party Transaction [Line Items]
Amount payable to related party								0			0		0
Xilingol Tongli Germanium Co. Ltd \| Raw materials purchases from related party \| Accounts payable \| Beijing Tongmei Xtal Technology
Related Party Transaction [Line Items]
Amount payable to related party								$ 0			$ 0		0
Beijing BoYu Semiconductor Vessel Craftwork Technology Co \| Lease of land \| Beijing Tongmei Xtal Technology
Related Party Transaction [Line Items]
Area of leased property (in square feet) \| ft²								22,081			22,081
Lease term								10 years			10 years
Annual lease payment											$ 24,000
Increase in annual lease payment at each third year anniversary (in hundredths)								5.00%			5.00%
Rental increase period											3 years
Nanjing JinMei Gallium Co., Ltd \| Related party loan \| Beijing Tongmei Xtal Technology
Related Party Transaction [Line Items]
Number of installments \| installment						3
Related party notes receivable - long term						$ 768,000
Amount payable to related party								$ 155,000			$ 155,000		303,000
Interest rate (as a percent)						4.90%
Repayment of related party notes receivable											703,000
Executive officer \| Related party loan \| Beijing BoYu Semiconductor Vessel Craftwork Technology Co
Related Party Transaction [Line Items]
Amount of transaction			$ 141,000	$ 146,000	$ 291,000		$ 177,000
Interest rate (as a percent)			2.75%	2.75%	2.75%		2.75%
Repayment of related party notes receivable	$ 612,000									$ 180,000
Proceeds from Collection of Interest from Long Term Loans to Related Parties	$ 35,000
Executive officer \| Related party loan \| Other assets \| Beijing BoYu Semiconductor Vessel Craftwork Technology Co
Related Party Transaction [Line Items]
Related party notes receivable - current								$ 0			$ 0		$ 0
3rd party investor \| Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment
Related Party Transaction [Line Items]
Raised additional capital		$ 2,000,000
Percentage ownership from issuance of shares		10.00%
Additional Minority Ownership Percentage by Parent													4
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent													$ 1,600,000
Percentage of Equity Interests Sold													6.00%
3rd party investor \| Beijing BoYu Semiconductor Vessel Craftwork Technology Co
Related Party Transaction [Line Items]
Revenue from related parties									$ 12,000
Raised additional capital		$ 2,000,000
Percentage ownership from issuance of shares		10.00%