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Balance Sheet Account Detail (Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 3,793 $ 3,901
Work-in-process 4,539 5,102
Finished goods 11,226 9,084
Inventories $ 19,558 $ 18,087