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Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Inventories
Raw materials	$ 7,635	$ 6,627
Work in process	1,334	1,056
Finished goods	3,208	3,365
Total inventory	$ 12,177	$ 11,048

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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