Segment Information and Foreign Operations - Product Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue by product type
Revenue	$ 23,645	$ 17,366	$ 74,256	$ 55,366
Substrates
Revenue by product type
Revenue	15,007	10,385	51,655	34,901
Raw materials and others
Revenue by product type
Revenue	$ 8,638	$ 6,981	$ 22,601	$ 20,465

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details