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Segment Information and Foreign Operations - Segment and Geographical Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Information and Foreign Operations
Number of operating segments | segment			1
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	$ 17,366	$ 35,183	$ 55,366	$ 114,323
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	161,651		161,651		$ 162,778
China
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	159,953		159,953		162,432
North America (primarily the United States)
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	1,698		1,698		$ 346
Reportable Geographical Components
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	17,366	35,183	55,366	114,323
Reportable Geographical Components | China
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	10,307	12,314	28,698	48,239
Reportable Geographical Components | Taiwan
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	2,491	7,816	6,369	21,719
Reportable Geographical Components | Japan
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	558	2,671	3,489	8,196
Reportable Geographical Components | Asia Pacific (excluding China, Taiwan and Japan)
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	894	765	2,722	3,183
Reportable Geographical Components | Europe (primarily Germany)
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	2,407	4,989	8,992	16,682
Reportable Geographical Components | North America (primarily the United States)
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	$ 709	$ 6,628	$ 5,096	$ 16,304

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