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Related-party Transactions (Details Textual) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Operating Leases Rent Expense, Net, Related Party $ 828 $ 705 $ 1,119
Operating Leases, Future Minimum Payments Due 2,122    
Related Parties Amount in Cost of Sales 31 348 449
Accounts Payable, Related Parties 0 9  
Other Accrued Liabilities [Member]
      
Operating Leases, Future Minimum Payments Due 206 326  
Cmi and Affiliates [Member] | Maximum [Member]
      
Line Of Credit Facility, Credit Terms 120 days    
Cmi and Affiliates [Member] | Minimum [Member]
      
Line Of Credit Facility, Credit Terms 30 days    
Other Related Parties [Member] | Maximum [Member]
      
Line Of Credit Facility, Credit Terms 90 days    
Other Related Parties [Member] | Minimum [Member]
      
Line Of Credit Facility, Credit Terms 45 days    
Unrelated Third Parties [Member] | Maximum [Member]
      
Line Of Credit Facility, Credit Terms 150 days    
Unrelated Third Parties [Member] | Minimum [Member]
      
Line Of Credit Facility, Credit Terms 15 days    
Fulintec [Member]
      
Property, Plant and Equipment, Additions     71
Chi Lin Tech [Member]
      
Research And Development Expense Related Party     $ 12