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Related Parties - Schedule of Account Receivable and Payable of Related Party Transactions (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Related Party Transaction [Line Items]    
Accounts receivable $ 3,555 $ 5,067
Accounts payable 13,303 12,945
Lite On Semiconductor
   
Related Party Transaction [Line Items]    
Accounts receivable 155 140
Accounts payable 5,919 5,670
Keylink
   
Related Party Transaction [Line Items]    
Accounts receivable 3,400 4,927
Accounts payable 6,230 6,505
Nuvoton
   
Related Party Transaction [Line Items]    
Accounts payable $ 1,154 $ 770