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Segment Information and Foreign Operations - Segment and Geographical Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)	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	$ 18,595	$ 39,487	$ 38,000	$ 79,140
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	160,145		160,145		$ 162,778
China
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	159,927		159,927		162,432
North America (primarily the United States)
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	218		218		$ 346
Reportable Geographical Components
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	18,595	39,487	38,000	79,140
Reportable Geographical Components | China
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	10,289	18,445	18,391	35,925
Reportable Geographical Components | Taiwan
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	1,407	7,044	3,878	13,903
Reportable Geographical Components | Japan
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	1,396	2,718	2,931	5,525
Reportable Geographical Components | Asia Pacific (excluding China, Taiwan and Japan)
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	737	662	1,828	2,418
Reportable Geographical Components | Europe (primarily Germany)
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	3,015	5,299	6,585	11,693
Reportable Geographical Components | North America (primarily the United States)
Net revenues reported for products shipped to customers in corresponding geographic region
Revenue	$ 1,751	$ 5,319	$ 4,387	$ 9,676

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