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Segment Information and Foreign Operations - Product Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenue by product type        
Revenue $ 17,366 $ 35,183 $ 55,366 $ 114,323
Substrates        
Revenue by product type        
Revenue 10,385 26,861 34,901 90,300
Raw Materials and Other        
Revenue by product type        
Revenue $ 6,981 $ 8,322 $ 20,465 $ 24,023