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Summary of Significant Accounting Policies (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Inventories    
Raw materials $ 21,267 $ 7,835
Work in progress 20,787 9,776
Finished goods 5,300 5,212
Inventory, Gross $ 47,354 $ 22,823