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Segments and Major Customers (Details 3) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Major Customer Disclosure                      
Revenue $ 57,443 [1] $ 57,530 [1] $ 56,215 $ 62,863 $ 83,359 $ 100,263 $ 66,214 $ 62,527 $ 234,051 $ 312,363 $ 323,390
Property, plant and equipment, net 86,905       81,105       86,905 81,105  
South Korea
                      
Major Customer Disclosure                      
Revenue                 88,971 94,197 181,865
USA
                      
Major Customer Disclosure                      
Revenue                 63,398 103,367 23,528
Property, plant and equipment, net 85,800       79,800       85,800 79,800  
Japan
                      
Major Customer Disclosure                      
Revenue                 63,686 97,726 117,101
Canada
                      
Major Customer Disclosure                      
Revenue                 7,759 14,750 592
Europe
                      
Major Customer Disclosure                      
Revenue                 5,236 1,992 157
Other
                      
Major Customer Disclosure                      
Revenue                 5,001 331 147
India
                      
Major Customer Disclosure                      
Property, plant and equipment, net 1,000       1,200       1,000 1,200  
Other foreign locations
                      
Major Customer Disclosure                      
Property, plant and equipment, net $ 100       $ 100       $ 100 $ 100  
[1] The quarterly financial information includes $6.6 million related to restructuring charges in the quarter ended September 30, 2012 and$0.7 million related to restructuring charges in the quarter ended December 31, 2012. Refer to Note 16, "Restructuring Charges" of Notes to Consolidated Financial Statements of this Form 10-K.