Inventories (Schedule of Inventory) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Components of Inventory
Raw materials	$ 10,608	$ 13,462
Work-in-process	0	3
Finished goods	18,798	19,363
Inventories	29,406	32,828
Less reserve for excess and obsolete inventory	(2,117)	(368)	$ (50)	$ (50)
Inventories, net	$ 27,289	$ 32,460

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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