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The Company and Summary of Significant Accounting Policies - The Company (Details) | 12 Months Ended
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Dec. 31, 2020 item segment
The Company and Summary of Significant Accounting Policies |
Number of product lines | segment | 2
Minimum |
The Company and Summary of Significant Accounting Policies |
Temperature in C | 500
Maximum |
The Company and Summary of Significant Accounting Policies |
Temperature in C | 1,500
Sales Revenue, Net | Specialty Material Substrates |
The Company and Summary of Significant Accounting Policies |
Revenue by product line (as a percent) | 79.00%
Sales Revenue, Net | Raw Materials |
The Company and Summary of Significant Accounting Policies |
Revenue by product line (as a percent) | 21.00%

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