Bank Loans and Line of Credit - Schedule of bank loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Loan Balance	$ 42,998	$ 12,229
Beijing Tongmei Xtal Technology | Bank Of China | Bank Loan with 3.9 Percent, March 2022 Due Date One.
Short-term Debt [Line Items]
Loan Detail		$ 1,405
Interest rate		3.90%
Loan Balance		$ 1,573
Beijing Tongmei Xtal Technology | Bank Of China | Bank Loan with 3.9 Percent, March 2022 Due Date Two.
Short-term Debt [Line Items]
Loan Detail		$ 1,050
Interest rate		3.90%
Loan Balance		$ 1,220
Beijing Tongmei Xtal Technology | Bank Of China | Bank Loan with 4.6 Percent, January 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 3,935
Interest rate	4.60%
Loan Balance	$ 3,939
Beijing Tongmei Xtal Technology | Bank Of China | Bank Loan with 2.7 Percent, March 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 2,108
Interest rate	2.70%
Loan Balance	$ 2,110
Beijing Tongmei Xtal Technology | Bank Of China | Bank Loan with 4.2 Percent, April 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail		$ 1,405
Interest rate		4.20%
Loan Balance	1,408
Beijing Tongmei Xtal Technology | Bank Of Communications | Bank Loan with 4 Percent September 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail		$ 2,811
Interest rate		4.00%
Loan Balance		$ 3,144
Beijing Tongmei Xtal Technology | Bank Of Communications | Bank Loan with 4 Percent November 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail		$ 1,405
Interest rate		4.00%
Loan Balance	1,408	$ 1,573
Beijing Tongmei Xtal Technology | Bank Of Communications | Bank Loan with 3.3 Percent January 2022 Due Date One.
Short-term Debt [Line Items]
Loan Detail	$ 1,405
Interest rate	3.30%
Loan Balance	$ 1,406
Beijing Tongmei Xtal Technology | Bank Of Communications | Bank Loan with 3.3 Percent January 2022 Due Date Two.
Short-term Debt [Line Items]
Loan Detail	$ 1,405
Interest rate	3.30%
Loan Balance	$ 1,406
Beijing Tongmei Xtal Technology | China Merchants Bank
Short-term Debt [Line Items]
Guarantee fee (as a percent)	1.50%
Beijing Tongmei Xtal Technology | China Merchants Bank | Bank Loan with 3.6 Percent, December 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 1,405	$ 1,405
Interest rate	3.60%	3.60%
Loan Balance	$ 1,406	$ 1,573
Beijing Tongmei Xtal Technology | China Merchants Bank | Bank Loan with 4.2 Percent, December 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 1,405	$ 1,405
Interest rate	4.20%	4.20%
Loan Balance	$ 1,407	$ 1,573
Beijing Tongmei Xtal Technology | Bank Of Beijing | Bank Loan with 4.2 Percent, May 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 3,192
Interest rate	4.20%
Loan Balance	$ 3,196
Beijing Tongmei Xtal Technology | Industrial Bank | Bank Loan with 4.4 Percent, June 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 5,621
Interest rate	4.40%
Loan Balance	$ 5,628
Beijing Tongmei Xtal Technology | Industrial Bank | Bank Loan with 4.4 Percent, September 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 2,811
Interest rate	4.40%
Loan Balance	$ 2,814
Beijing Tongmei Xtal Technology | NingBo Bank | Bank Loan with 4.8 Percent, June 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 1,405
Interest rate	4.80%
Loan Balance	$ 1,406
Beijing Tongmei Xtal Technology | NingBo Bank | Bank Loan with 4.8 Percent, August 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 1,405
Interest rate	4.80%
Loan Balance	$ 1,406
Beijing Tongmei Xtal Technology | NingBo Bank | Bank Loan with 4.8 Percent, September 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 1,405
Interest rate	4.80%
Loan Balance	$ 1,406
Beijing Tongmei Xtal Technology | Industrial And Commercial Bank Of China | Bank Loan with 3.2 Percent, July 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 5,621
Interest rate	3.20%
Loan Balance	$ 5,621
Beijing Tongmei Xtal Technology | NanJing Bank | Bank Loan with 4.3 Percent, September 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 2,811
Interest rate	4.30%
Loan Balance	$ 2,811
Beijing BoYu Semiconductor Vessel Craftwork Technology Co | NingBo Bank | Bank Loan with 4.8 Percent, December 2022 Due Date One.
Short-term Debt [Line Items]
Loan Detail	$ 1,405
Interest rate	4.80%
Loan Balance	$ 1,406
Beijing BoYu Semiconductor Vessel Craftwork Technology Co | NingBo Bank | Bank Loan with 4.8 Percent, December 2022 Due Date Two.
Short-term Debt [Line Items]
Loan Detail	$ 703
Interest rate	4.80%
Loan Balance	$ 704
Beijing BoYu Semiconductor Vessel Craftwork Technology Co | NingBo Bank | Bank Loan with 4.8 Percent, March 2023 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 703
Interest rate	4.80%
Loan Balance	$ 704
Beijing BoYu Semiconductor Vessel Craftwork Technology Co | Industrial And Commercial Bank Of China | Bank Loan with 3.9 Percent, December 2022 Due Date.
Short-term Debt [Line Items]
Loan Detail	$ 1,405	$ 1,405
Interest rate	3.90%	3.90%
Loan Balance	$ 1,406	$ 1,573