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Other Assets and Amounts Due to / Due From Affiliates (Non-Marketable Securities - Cost Method Investments and Other) (Details) (USD $)
 12 Months Ended 12 Months Ended 3 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Dec. 25, 2010
Dec. 29, 2012
Patents
Dec. 29, 2012
Private company which makes display related products
Dec. 31, 2011
Private company which makes display related products
Dec. 29, 2012
Interest in a private company
Dec. 29, 2012
Interest in a private company
Achievement of certain development milestones
Dec. 29, 2012
Interest in a private company
Right to acquire additional equity interest
Dec. 29, 2012
Interest in a private company
Obligation to purchase additional equity interest
Mar. 14, 2013
Subsequent event
Founder of Aurisound
Common stock
Mar. 14, 2013
Subsequent event
Achievement of certain development milestones
Founder of Aurisound
Common stock
Mar. 14, 2013
Subsequent event
Vested immediately
Founder of Aurisound
Common stock
Mar. 14, 2013
Subsequent event
Interest in a private company
Mar. 14, 2013
Subsequent event
Aurisound
Schedule of Other Assets, Including Investments in Affiliates [Line Items]                              
Percentage of equity interests acquired             5.00%                
Payments to acquire cost method investments         $ 500,000 $ 2,000,000 $ 1,000,000             $ 900,000  
Additional equity interests acquired or to be acquired               7.50% 10.00% 25.00%       10.00%  
Potential payment to acquire additional equity interest               1,000,000 2,000,000 2,000,000          
Period for purchasing additional equity interests             8 months                
Loan to a non-officer employee 140,000                            
Carrying value of patents       0                      
Sublicense fee income   200,000 800,000                        
Additional consideration to be received 0                            
Total purchase price                             $ 1,800,000
Shares issued in connection with employment offer to Aurisound founder                     400,000 300,000 100,000