Quarterly report pursuant to Section 13 or 15(d)

Sales to Major Customers (Details)

v2.4.0.6
Sales to Major Customers (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Dec. 31, 2011
Panasonic [Member]
         
Information relating to the activity with customers          
Percent of consolidated revenue 40.00% 39.00% 38.00% 36.00%  
Accounts Receivable $ 18,425   $ 18,425   $ 9,878
U.S. Government [Member]
         
Information relating to the activity with customers          
Percent of consolidated revenue 7.00% 9.00% 7.00% 10.00%  
Accounts Receivable $ 2,126   $ 2,126   $ 3,866