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Related Parties (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Lite On Semiconductor [Member]
       
Sales and Purchase Retated Parties [Line Items]        
Related Party ownership of common stock 18.40%   18.40%  
Percentage of net sales to related party 0.00% 2.00% 6.00% 11.00%
Net sales from related party $ 505,000 $ 2,038,000 $ 952,000 $ 4,526,000
Purchased from related party 9,541,000 11,623,000 18,494,000 20,888,000
Related party receivable or payable [Abstract]        
Accounts receivable 446,000   446,000  
Accounts payable 8,031,000   8,031,000  
Keylink [Member]
       
Sales and Purchase Retated Parties [Line Items]        
Percentage of net sales to related party 0.00% 3.00% 1.00% 3.00%
Net sales from related party 18,000 4,129,000 1,204,000 7,742,000
Purchased from related party 3,017,000 2,547,000 5,880,000 5,173,000
Related Party Transaction Consulting Fees From Transactions With Related Party     8,000,000 8,000,000
Related party receivable or payable [Abstract]        
Accounts receivable 700,000   700,000  
Accounts payable $ 7,059,000   $ 7,059,000