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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Schedule of inventories [Abstract]
Raw materials and work-in-process	$ 11,326	$ 12,631
Finished goods	15,682	14,916
Total inventories	$ 27,008	$ 27,547

The aggregate carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of items which are partially completed at the time of measurement and unprocessed items that will go through the production process and become part of the final product. This element may be used when the reporting entity combines work in process and raw materials into an aggregate amount.

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