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Inventories (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Jan. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014
Inventory Disclosure [Abstract] |  |  |  |
Shelf life | 6 years | 5 years |  |
Extended Shelf Life | 7 years | 6 years |  |
Inventory reserves, obsolescence and discontinuance |  |  | $ 2.7 | $ 3.2

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