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Inventories (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Inventories (Details) [Line Items] |  |
Inventory Valuation Reserves | $ 4.9 | $ 4.9
Product [Member] |  |
Inventories (Details) [Line Items] |  |
Cost of Goods Sold, Overhead | $ 4.3 | $ 4.2

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