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Balance Sheet Account Detail Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 5,443 $ 3,260
Work-in-process 4,888 4,617
Finished goods 9,507 10,222
Inventories $ 19,838 $ 18,099