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Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue |  |
Total revenues | $ 43,268 | $ 53,141
Products |  |
Disaggregation of Revenue |  |
Total revenues | 40,265 | 50,478
Services |  |
Disaggregation of Revenue |  |
Total revenues | $ 3,003 | $ 2,663

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. 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