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Business Segment, Geographic and Major Customer Information - Major Customers (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Segment Reporting Information |  |
Revenue from external customers | $ 10,382 | $ 11,770
Customer Concentration Risk | Sales | Customer A | Chemistry Technologies |  |
Segment Reporting Information |  |
Revenue from external customers | $ 0 | $ 3,029
Percentage of revenue by major customers (in percentage) | 0.00% | 25.70%
Customer Concentration Risk | Sales | Customer B | Chemistry Technologies |  |
Segment Reporting Information |  |
Revenue from external customers | $ 2,607 | $ 2,849
Percentage of revenue by major customers (in percentage) | 20.20% | 24.20%
Customer Concentration Risk | Sales | Customer C (Related Party) | Chemistry Technologies |  |
Segment Reporting Information |  |
Revenue from external customers | $ 1,389 |
Percentage of revenue by major customers (in percentage) | 10.80% |

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