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Segment Information and Foreign Operations - Product Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue by product type
Revenue	$ 137,393	$ 95,361	$ 83,256
Substrates
Revenue by product type
Revenue	103,026	75,587	67,849
Raw Materials And Others
Revenue by product type
Revenue	$ 34,367	$ 19,774	$ 15,407

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