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Segment Information and Foreign Operations - Product Information (Details) - Single reportable segment - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue by product type
Revenue	$ 99,361	$ 75,795	$ 141,118
Substrates
Revenue by product type
Revenue	67,748	47,466	111,094
Raw materials and others
Revenue by product type
Revenue	$ 31,613	$ 28,329	$ 30,024

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