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Business Segmentation and Geographical Distribution (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Sales | $ 14,193 | $ 12,471
Product Revenue [Member] |  |
Sales | 14,040 | 12,129
Advanced Materials [Member] |  |
Sales | 2,253 | 4,543
Solesence [Member] |  |
Sales | $ 1,367 | $ 54

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