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Segment Information and Foreign Operations - Product Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Revenue by product type        
Revenue $ 18,595 $ 39,487 $ 38,000 $ 79,140
Substrates        
Revenue by product type        
Revenue 11,027 31,694 24,516 63,439
Raw Materials and Other        
Revenue by product type        
Revenue $ 7,568 $ 7,793 $ 13,484 $ 15,701