Segment Information and Foreign Operations - Segment and Geographical Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | segment			1
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract]
Revenue	$ 39,487	$ 33,735	$ 79,140	$ 65,085
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	154,903		154,903		$ 144,739
Reportable Geographical Components | China
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract]
Revenue	18,445	15,546	35,925	31,092
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	154,057		154,057		143,129
Reportable Geographical Components | Taiwan
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract]
Revenue	7,044	4,996	13,903	8,011
Reportable Geographical Components | Japan
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract]
Revenue	2,718	2,635	5,525	5,158
Reportable Geographical Components | Asia Pacific (excluding China, Taiwan, and Japan)
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract]
Revenue	662	1,396	2,418	3,213
Reportable Geographical Components | Europe
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract]
Revenue	5,299	6,411	11,693	11,846
Reportable Geographical Components | North America
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract]
Revenue	5,319	$ 2,751	9,676	$ 5,765
Long-lived assets by geographic region, net of depreciation:
Long-lived assets	$ 846		$ 846		$ 1,610